50278 + Interview Questions in Physics

1.	Which of the following is the evidence to show that there must be a force acting on earth and directed towards the sun
Answer» Which of the following is the evidence to show that there must be a force acting on earth and directed towards the sun

Discussion

2.	What minimum horizontal speed should be given to the bob of a simple pendulum of length l so that it describes a complete circle?
Answer» What minimum horizontal speed should be given to the bob of a simple pendulum of length l so that it describes a complete circle?

Discussion

3.	Three rods of identical cross-sectional area and made from the same metal form the sides of an isosceles triangle ABC, right angled at B. The points A and B are maintained at T and √2T respectively. In the steady state, the temperature of the point C is TC. Assuming that only heat conduction takes place, TCT is
Answer» Three rods of identical cross-sectional area and made from the same metal form the sides of an isosceles triangle ABC, right angled at B. The points A and B are maintained at $T$ and $\sqrt{2} T$ respectively. In the steady state, the temperature of the point C is $T_{C}$ . Assuming that only heat conduction takes place, $\frac{T_{C}}{T}$ is

Discussion

4.	The speed of a molecule of gas in a cubical vessel of side 4 m is 16 m/s. This molecule is constantly colliding with the wall of the container. The collision frequency will be
Answer» The speed of a molecule of gas in a cubical vessel of side $4 m$ is $16 m/s$ . This molecule is constantly colliding with the wall of the container. The collision frequency will be

Discussion

5.	Find the velocity of images formed due to a point object O w.r.t. ground if the mirror is at rest. All speeds given are w.r.t a stationary ground observer
Answer» Find the velocity of images formed due to a point object $O$ w.r.t. ground if the mirror is at rest. All speeds given are w.r.t a stationary ground observer

Discussion

6.	Alternating current is represented by
Answer» Alternating current is represented by

Discussion

7.	Given: v=0.6−0.3t (in SI units). The acceleration is
Answer» Given: $v = 0.6 - 0.3 t$ (in SI units). The acceleration is

Discussion

8.	In an isothermal change, an ideal gas obeys
Answer» In an isothermal change, an ideal gas obeys

Discussion

9.	A simple pendulum is suspended from the ceiling of a car accelerating uniformly on a horizontal road. If the acceleration is a0 and the length of the pendulum is l, find the time period of small oscillations about the mean position.
Answer» A simple pendulum is suspended from the ceiling of a car accelerating uniformly on a horizontal road. If the acceleration is $a_{0}$ and the length of the pendulum is l, find the time period of small oscillations about the mean position.

Discussion

10.	An inductor of inductance 5.0 H, having a negligible resistance, is connected in series with a 100 Ω resistor and a battery of emf 2.0 V. Find the potential difference across the resistor 20 ms after the circuit is switched on.
Answer» An inductor of inductance 5.0 H, having a negligible resistance, is connected in series with a $100 Ω$ resistor and a battery of emf 2.0 V. Find the potential difference across the resistor 20 ms after the circuit is switched on.

Discussion

11.	On seeing a board of speed limit, you apply brakes that brings the car from speed of 108 km/h to a speed of 72 km/h, covering a distance of 100 m at a constant deceleration. How much time is required for the given decrease in speed?
Answer» On seeing a board of speed limit, you apply brakes that brings the car from speed of $108 km/h$ to a speed of $72 km/h$ , covering a distance of $100 m$ at a constant deceleration. How much time is required for the given decrease in speed?

Discussion

12.	Identify an appropriate question tag for the sentence below. I heated my lunch in the microwave, ___________?
Answer» Identify an appropriate question tag for the sentence below. I heated my lunch in the microwave, ___________?

12.

Identify an appropriate question tag for the sentence below. I heated my lunch in the microwave, ___________?

Answer»

Identify an appropriate question tag for the sentence below.

I heated my lunch in the microwave, ___________?

Discussion

13.	Find the density when a liquid 5 m high in a column exerts a pressure of 80 Pa
Answer» Find the density when a liquid 5 m high in a column exerts a pressure of 80 Pa

Discussion

14.	Two wires A and B of same length and of the same material have the respective radii r1 and r2. Their one end is fixed with a rigid support, and at the other ends equal twisting couple is applied. Then the ratio of the angle of twist at the end of A and The angle of twist at the end of B will be
Answer» Two wires A and B of same length and of the same material have the respective radii $r_{1} a n d r_{2}$ . Their one end is fixed with a rigid support, and at the other ends equal twisting couple is applied. Then the ratio of the angle of twist at the end of A and The angle of twist at the end of B will be

14.

Two wires A and B of same length and of the same material have the respective radii r1 and r2. Their one end is fixed with a rigid support, and at the other ends equal twisting couple is applied. Then the ratio of the angle of twist at the end of A and The angle of twist at the end of B will be

Answer»

Two wires A and B of same length and of the same material have the respective radii $r_{1} a n d r_{2}$ . Their one end is fixed with a rigid support, and at the other ends equal twisting couple is applied. Then the ratio of the angle of twist at the end of A and The angle of twist at the end of B will be

Discussion

15.	If electron, proton and alpha particle have the same wavelength and kinetic energies , and , then the order of their kinetic energies E1,E2 and E3, then the order of their kinetic energies is given by :
Answer» If electron, proton and alpha particle have the same wavelength and kinetic energies , and , then the order of their kinetic energies $E_{1}, E_{2} a n d E_{3}$ , then the order of their kinetic energies is given by :

Discussion

16.	If sinθ=35, find the value of tanθ.
Answer» If $sin θ = \frac{3}{5},$ find the value of $tan θ .$

Discussion

17.	Electric field intensity at any point on the axis of a uniform charged ring when the observation point lie far away from the charged loop is
Answer» Electric field intensity at any point on the axis of a uniform charged ring when the observation point lie far away from the charged loop is

Discussion

18.	A car travels the first half of a distance between two places at a speed of 30 km/hr and the second half of the distance at 50 km/hr. The average speed of the car for the whole journey is
Answer» A car travels the first half of a distance between two places at a speed of 30 km/hr and the second half of the distance at 50 km/hr. The average speed of the car for the whole journey is

18.

A car travels the first half of a distance between two places at a speed of 30 km/hr and the second half of the distance at 50 km/hr. The average speed of the car for the whole journey is

Answer»

A car travels the first half of a distance between two places at a speed of 30 km/hr and the second half of the distance at 50 km/hr. The average speed of the car for the whole journey is

Discussion

19.	Nuclei of a radioactive element are being produced at a constant rate α. The element has a decay constant λ. At time t = 0, there are N0 nuclei of the element. If α=2N0λ, the number N of nuclei as t →∞ is
Answer» Nuclei of a radioactive element are being produced at a constant rate $α$ . The element has a decay constant $λ$ . At time t = 0, there are $N_{0}$ nuclei of the element. If $α = 2 N_{0} λ$ , the number N of nuclei as t $\to \infty$ is

19.

Nuclei of a radioactive element are being produced at a constant rate α. The element has a decay constant λ. At time t = 0, there are N0 nuclei of the element. If α=2N0λ, the number N of nuclei as t →∞ is

Answer»

Nuclei of a radioactive element are being produced at a constant rate $α$ . The element has a decay constant $λ$ . At time t = 0, there are $N_{0}$ nuclei of the element.

If $α = 2 N_{0} λ$ , the number N of nuclei as t $\to \infty$ is

Discussion

20.	At any instant, the ratio of the amount of radioactive substance is 2 : 1. If their half lives be respectively 12 and 16 hours, then after two days, what will be the ratio of the substance
Answer» At any instant, the ratio of the amount of radioactive substance is 2 : 1. If their half lives be respectively 12 and 16 hours, then after two days, what will be the ratio of the substance

Discussion

21.	The electric potential at a point is given by V=−6x2 The electric field strength at x=2 is
Answer» The electric potential at a point is given by $V = - 6 x^{2}$ The electric field strength at x=2 is

Discussion

22.	For the arrangement of mirror and object shown in figure, the velocity of image w.r.t ground is:
Answer» For the arrangement of mirror and object shown in figure, the velocity of image w.r.t ground is:

Discussion

23.	Diameter of a cylinder measured by vernier callipers of least count 0.1 mm is 2 cm. The length of the cylinder is 15 cm as measured by a scale whose least count is 1 mm. Percentage error in measurement of volume will be (Write upto two digits after the decimal point.)
Answer» Diameter of a cylinder measured by vernier callipers of least count 0.1 mm is 2 cm. The length of the cylinder is 15 cm as measured by a scale whose least count is 1 mm. Percentage error in measurement of volume will be (Write upto two digits after the decimal point.)

Discussion

24.	For the given uniform square lamina ABCD, whose centre is O. Then ( Here I denotes moment of inertia)
Answer» For the given uniform square lamina ABCD, whose centre is O. Then ( Here $I$ denotes moment of inertia)

Discussion

25.	An observer starts moving with uniform acceleration a towards a stationary sound source of frequency f0. As the observer approaches the source, the apparent frequency f heard by the observer varies with time t as
Answer» An observer starts moving with uniform acceleration a towards a stationary sound source of frequency $f_{0}$ . As the observer approaches the source, the apparent frequency f heard by the observer varies with time t as

Discussion

26.	A planet is at an average distance d from the sun, and its average surface temperature is T. Assume that the planet receives energy only from the sun, and loses energy only through radiation from its surface. Neglect atmospheric effects, if T∝d−n, the value of n is
Answer» A planet is at an average distance d from the sun, and its average surface temperature is T. Assume that the planet receives energy only from the sun, and loses energy only through radiation from its surface. Neglect atmospheric effects, if $T \propto d^{- n}$ , the value of n is

Discussion

27.	A long metallic rod of mass m is being moved on two smooth horizontal metallic rails with constant velocity v. The angle between the rails is α. A uniform magnetic field (B) in vertical direction is present as shown. The capacitor is initially uncharged. The resistance of the circuit is zero. Choose the correct graph(s) from the following
Answer» A long metallic rod of mass $m$ is being moved on two smooth horizontal metallic rails with constant velocity $v$ . The angle between the rails is $α$ . A uniform magnetic field (B) in vertical direction is present as shown. The capacitor is initially uncharged. The resistance of the circuit is zero. Choose the correct graph(s) from the following

Discussion

28.	A point charge Q is placed at the vertex of a regular tetrahedron with square base of side a as shown in figure, where OA = OB = OC = OD =a√32. Flux of electric field associated with rectangular base is Qnϵ0,where n is .
Answer» A point charge Q is placed at the vertex of a regular tetrahedron with square base of side a as shown in figure, where OA = OB = OC = OD $= \frac{a \sqrt{3}}{2}$ . Flux of electric field associated with rectangular base is $\frac{Q}{n ϵ_{0}}$ ,where n is .

Discussion

29.	An open cubical container of side H is filled with a liquid up to height H4. Mass of liquid inside container is 'm' (neglect atmospheric pressure). When the container is moved with maximum possible acceleration without spilling water, what will be the magnitude of force applied by liquid on left wall parallel to plane of paper?
Answer» An open cubical container of side $H$ is filled with a liquid up to height $\frac{H}{4} .$ Mass of liquid inside container is 'm' (neglect atmospheric pressure). When the container is moved with maximum possible acceleration without spilling water, what will be the magnitude of force applied by liquid on left wall parallel to plane of paper?

Discussion

30.	In damped oscillations, damping force is directly proportional to the speed of the oscillator. If amplitude becomes half of its initial value in 1 s, then after 2 s, amplitude will be: [A0 is initial amplitude]
Answer» In damped oscillations, damping force is directly proportional to the speed of the oscillator. If amplitude becomes half of its initial value in $1 s$ , then after $2 s$ , amplitude will be: [ $A_{0}$ is initial amplitude]

Discussion

31.	The following figure shows a logic gate circuit with two inputs A and B and the output C. The voltage wavefront of A, B and C are as shown in the figure. The logic circuit gate is
Answer» The following figure shows a logic gate circuit with two inputs A and B and the output C. The voltage wavefront of A, B and C are as shown in the figure. The logic circuit gate is

Discussion

32.	A tank is filled up to a height 2H with a liquid and is placed on a platform of height H from the ground. The distance a from the ground where a small hole is punched to get the maximum range 2R is
Answer» A tank is filled up to a height 2H with a liquid and is placed on a platform of height H from the ground. The distance a from the ground where a small hole is punched to get the maximum range 2R is

32.

A tank is filled up to a height 2H with a liquid and is placed on a platform of height H from the ground. The distance a from the ground where a small hole is punched to get the maximum range 2R is

Answer»

A tank is filled up to a height 2H with a liquid and is placed on a platform of height H from the ground. The distance a from the ground where a small hole is punched to get the maximum range 2R is

Discussion

33.	Two putty balls of equal masses moving with equal velocity in mutually perpendicular directions, stick together after collision. If the balls were initially moving with a velocity of 45√2 ms−1 each, the velocity of their combined mass after collision is
Answer» Two putty balls of equal masses moving with equal velocity in mutually perpendicular directions, stick together after collision. If the balls were initially moving with a velocity of $45 \sqrt{2} m s^{- 1}$ each, the velocity of their combined mass after collision is

Discussion

34.	The sides of an isosceles right prism are coated with a reflecting coating . A ray of light falls on the hypotenuse at an arbitrary angle, i . For what value of'i' the ray leaving the prism is parallel to the incident ray?
Answer» The sides of an isosceles right prism are coated with a reflecting coating . A ray of light falls on the hypotenuse at an arbitrary angle, i . For what value of'i' the ray leaving the prism is parallel to the incident ray?

34.

The sides of an isosceles right prism are coated with a reflecting coating . A ray of light falls on the hypotenuse at an arbitrary angle, i . For what value of'i' the ray leaving the prism is parallel to the incident ray?

Answer»

The sides of an isosceles right prism are coated with a reflecting coating . A ray of light falls on the hypotenuse at an arbitrary angle, i . For what value of'i' the ray leaving the prism is parallel to the incident ray?

Discussion

35.	A car moves at a constant speed on a road as shown in figure. The normal force by the road on the car is NA and NB when it is at the points A and B respectively. Then?
Answer» A car moves at a constant speed on a road as shown in figure. The normal force by the road on the car is N_A and N_B when it is at the points A and B respectively. Then?

35.

A car moves at a constant speed on a road as shown in figure. The normal force by the road on the car is NA and NB when it is at the points A and B respectively. Then?

Answer»

A car moves at a constant speed on a road as shown in figure. The normal force by the road on the car is N_A and N_B when it is at the points A and B respectively. Then?

Discussion

36.	Two forces, of equal magnitude P, are inclined at angle α with each other. If the resultant is also P, then the angle α (in degree) is
Answer» Two forces, of equal magnitude $P,$ are inclined at angle $α$ with each other. If the resultant is also $P,$ then the angle $α$ (in degree) is

Discussion

37.	Two boats leave shore. One moves due north at 10 m/s speed, and the other at 37o North of East at 10 m/s. The speed of one boat with respect to another is (√5=2.236) Write the answer until two digits after the decimal point.
Answer» Two boats leave shore. One moves due north at 10 m/s speed, and the other at $37^{o}$ North of East at 10 m/s. The speed of one boat with respect to another is ( $\sqrt{5} = 2.236$ ) Write the answer until two digits after the decimal point.

Discussion

38.	A bag (mass M) hangs by a long thread and a bullet (mass m) comes horizontally with velocity v and gets caught in the bag. Then for the combined (bag + bullet) system
Answer» A bag (mass M) hangs by a long thread and a bullet (mass m) comes horizontally with velocity v and gets caught in the bag. Then for the combined (bag + bullet) system

Discussion

39.	In the figure shown, the ratio of the force exerted by 1 kg body on 2 kg body in the two cases is
Answer» In the figure shown, the ratio of the force exerted by $1 kg$ body on $2 kg$ body in the two cases is

Discussion

40.	A tuning fork sends sound waves in air. If the temperature of the air increases, which of the following parameters will change?
Answer» A tuning fork sends sound waves in air. If the temperature of the air increases, which of the following parameters will change?

Discussion

41.	Two blocks of equal mass m are connected by an un-stretched spring and the system is kept at rest on α frictionless horizontal surface. A constant force F is applied on one of the blocks pulling it away from the other as shown in figure. If the extension of the spring is x0 at time t, find the displacement of the two blocks at this instant.
Answer» Two blocks of equal mass m are connected by an un-stretched spring and the system is kept at rest on α frictionless horizontal surface. A constant force F is applied on one of the blocks pulling it away from the other as shown in figure. If the extension of the spring is $x_{0}$ at time t, find the displacement of the two blocks at this instant.

41.

Two blocks of equal mass m are connected by an un-stretched spring and the system is kept at rest on α frictionless horizontal surface. A constant force F is applied on one of the blocks pulling it away from the other as shown in figure. If the extension of the spring is x0 at time t, find the displacement of the two blocks at this instant.

Answer»

Two blocks of equal mass m are connected by an un-stretched spring and the system is kept at rest on α frictionless horizontal surface. A constant force F is applied on one of the blocks pulling it away from the other as shown in figure. If the extension of the spring is $x_{0}$ at time t, find the displacement of the two blocks at this instant.

Discussion

42.	The inputs of a NAND gate are connected together. The resultant circuit is
Answer» The inputs of a NAND gate are connected together. The resultant circuit is

Discussion

43.	What is the weightage on each topic as per new exam pattern.
Answer» What is the weightage on each topic as per new exam pattern.

Discussion

44.	A tunnel is dug along a chord of the earth at a perpendicular distance R/2 from the earth's centre. The wall of the tunnel may be assumed to be frictionless. A particle is released from one end of the tunnel. The pressing force by the particle on the wall and the acceleration of the particle varies with x (distance of the particle from the centre) according to
Answer» A tunnel is dug along a chord of the earth at a perpendicular distance R/2 from the earth's centre. The wall of the tunnel may be assumed to be frictionless. A particle is released from one end of the tunnel. The pressing force by the particle on the wall and the acceleration of the particle varies with x (distance of the particle from the centre) according to

Discussion

45.	The value of Planck's constant is 6.6310-34J-s. The velocity of light is 3108 m/sec. Which value is closest to the wavelength in nanometre of a quantum of lighr with frequency of 81015 /sec. A.510-18 B.410 C.310^7 D.2*10^-25
Answer» The value of Planck's constant is 6.6310^-34J-s. The velocity of light is 310⁸ m/sec. Which value is closest to the wavelength in nanometre of a quantum of lighr with frequency of 810¹⁵ /sec. A.510^-18 ^B.410 ^C.310^{^7} ^{D.2*10^-25}

45.

The value of Planck's constant is 6.6310-34J-s. The velocity of light is 3108 m/sec. Which value is closest to the wavelength in nanometre of a quantum of lighr with frequency of 81015 /sec. A.510-18 B.410 C.310^7 D.2*10^-25

Answer»

The value of Planck's constant is 6.63*10^-34J-s. The velocity of light is 3*10⁸ m/sec. Which value is closest to the wavelength in nanometre of a quantum of lighr with frequency of 8*10¹⁵ /sec.

A.5*10^-18

^B.4*10

^C.3*10^{^7}

^{D.2*10^-25}

Discussion

46.	Two conducting spheres of radii r1 and r2 are at the same potential. Their charges are in the ratio of
Answer» Two conducting spheres of radii $r_{1}$ and r₂ are at the same potential. Their charges are in the ratio of

Discussion

47.	A force F=−k(yi+xj) (where k is a positive constant) acts on a particle moving in the xy - plane. Starting from the origin, the particle is taken along the positive x - axis to the point (a,0) and then parallel to the y - axis to the point (a,a). The total work done by the force F on the particle is
Answer» A force $F = - k (y i + x j)$ (where $k$ is a positive constant) acts on a particle moving in the $x y$ - plane. Starting from the origin, the particle is taken along the positive $x$ - axis to the point $(a, 0)$ and then parallel to the $y$ - axis to the point $(a, a)$ . The total work done by the force $F$ on the particle is

Discussion

48.	In the shown figure two beads slide along a smooth horizontal rod as shown in the figure. The relation between v and v0 in the shown position will be
Answer» In the shown figure two beads slide along a smooth horizontal rod as shown in the figure. The relation between $v$ and $v_{0}$ in the shown position will be

Discussion

49.	During a projectile motion, if the maximum height equals the horizontal range, then the angle of projection with the horizontal is
Answer» During a projectile motion, if the maximum height equals the horizontal range, then the angle of projection with the horizontal is

Discussion

50.	Force F on a particle moving in a straight line varies with distance d as shown in the figure The work done on the particle during its displacement of 12 m is
Answer» Force $F$ on a particle moving in a straight line varies with distance $d$ as shown in the figure The work done on the particle during its displacement of $12 m$ is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following is the evidence to show that there must be a force acting on earth and directed towards the sun

What minimum horizontal speed should be given to the bob of a simple pendulum of length l so that it describes a complete circle?

The speed of a molecule of gas in a cubical vessel of side 4 m is 16 m/s. This molecule is constantly colliding with the wall of the container. The collision frequency will be

Find the velocity of images formed due to a point object O w.r.t. ground if the mirror is at rest. All speeds given are w.r.t a stationary ground observer

Alternating current is represented by

Given: v=0.6−0.3t (in SI units). The acceleration is

In an isothermal change, an ideal gas obeys

A simple pendulum is suspended from the ceiling of a car accelerating uniformly on a horizontal road. If the acceleration is a0 and the length of the pendulum is l, find the time period of small oscillations about the mean position.

An inductor of inductance 5.0 H, having a negligible resistance, is connected in series with a 100 Ω resistor and a battery of emf 2.0 V. Find the potential difference across the resistor 20 ms after the circuit is switched on.

On seeing a board of speed limit, you apply brakes that brings the car from speed of 108 km/h to a speed of 72 km/h, covering a distance of 100 m at a constant deceleration. How much time is required for the given decrease in speed?

Identify an appropriate question tag for the sentence below. I heated my lunch in the microwave, ___________?

Find the density when a liquid 5 m high in a column exerts a pressure of 80 Pa

Two wires A and B of same length and of the same material have the respective radii r1 and r2. Their one end is fixed with a rigid support, and at the other ends equal twisting couple is applied. Then the ratio of the angle of twist at the end of A and The angle of twist at the end of B will be

If electron, proton and alpha particle have the same wavelength and kinetic energies , and , then the order of their kinetic energies E1,E2 and E3, then the order of their kinetic energies is given by :

If sinθ=35, find the value of tanθ.

Electric field intensity at any point on the axis of a uniform charged ring when the observation point lie far away from the charged loop is

A car travels the first half of a distance between two places at a speed of 30 km/hr and the second half of the distance at 50 km/hr. The average speed of the car for the whole journey is

Nuclei of a radioactive element are being produced at a constant rate α. The element has a decay constant λ. At time t = 0, there are N0 nuclei of the element. If α=2N0λ, the number N of nuclei as t →∞ is

At any instant, the ratio of the amount of radioactive substance is 2 : 1. If their half lives be respectively 12 and 16 hours, then after two days, what will be the ratio of the substance

The electric potential at a point is given by V=−6x2 The electric field strength at x=2 is

For the arrangement of mirror and object shown in figure, the velocity of image w.r.t ground is:

Diameter of a cylinder measured by vernier callipers of least count 0.1 mm is 2 cm. The length of the cylinder is 15 cm as measured by a scale whose least count is 1 mm. Percentage error in measurement of volume will be (Write upto two digits after the decimal point.)

For the given uniform square lamina ABCD, whose centre is O. Then ( Here I denotes moment of inertia)

An observer starts moving with uniform acceleration a towards a stationary sound source of frequency f0. As the observer approaches the source, the apparent frequency f heard by the observer varies with time t as

A planet is at an average distance d from the sun, and its average surface temperature is T. Assume that the planet receives energy only from the sun, and loses energy only through radiation from its surface. Neglect atmospheric effects, if T∝d−n, the value of n is

A point charge Q is placed at the vertex of a regular tetrahedron with square base of side a as shown in figure, where OA = OB = OC = OD =a√32. Flux of electric field associated with rectangular base is Qnϵ0,where n is .

In damped oscillations, damping force is directly proportional to the speed of the oscillator. If amplitude becomes half of its initial value in 1 s, then after 2 s, amplitude will be: [A0 is initial amplitude]

The following figure shows a logic gate circuit with two inputs A and B and the output C. The voltage wavefront of A, B and C are as shown in the figure. The logic circuit gate is

A tank is filled up to a height 2H with a liquid and is placed on a platform of height H from the ground. The distance a from the ground where a small hole is punched to get the maximum range 2R is

Two putty balls of equal masses moving with equal velocity in mutually perpendicular directions, stick together after collision. If the balls were initially moving with a velocity of 45√2 ms−1 each, the velocity of their combined mass after collision is

The sides of an isosceles right prism are coated with a reflecting coating . A ray of light falls on the hypotenuse at an arbitrary angle, i . For what value of'i' the ray leaving the prism is parallel to the incident ray?

A car moves at a constant speed on a road as shown in figure. The normal force by the road on the car is NA and NB when it is at the points A and B respectively. Then?

Two forces, of equal magnitude P, are inclined at angle α with each other. If the resultant is also P, then the angle α (in degree) is

Two boats leave shore. One moves due north at 10 m/s speed, and the other at 37o North of East at 10 m/s. The speed of one boat with respect to another is (√5=2.236) Write the answer until two digits after the decimal point.

A bag (mass M) hangs by a long thread and a bullet (mass m) comes horizontally with velocity v and gets caught in the bag. Then for the combined (bag + bullet) system

In the figure shown, the ratio of the force exerted by 1 kg body on 2 kg body in the two cases is

A tuning fork sends sound waves in air. If the temperature of the air increases, which of the following parameters will change?

The inputs of a NAND gate are connected together. The resultant circuit is

What is the weightage on each topic as per new exam pattern.

The value of Planck's constant is 6.63*10-34J-s. The velocity of light is 3*108 m/sec. Which value is closest to the wavelength in nanometre of a quantum of lighr with frequency of 8*1015 /sec. A.5*10-18 B.4*10 C.3*10​​​​​​^7 D.2*10^-25

Two conducting spheres of radii r1 and r2 are at the same potential. Their charges are in the ratio of

In the shown figure two beads slide along a smooth horizontal rod as shown in the figure. The relation between v and v0 in the shown position will be

During a projectile motion, if the maximum height equals the horizontal range, then the angle of projection with the horizontal is

Force F on a particle moving in a straight line varies with distance d as shown in the figure The work done on the particle during its displacement of 12 m is

The value of Planck's constant is 6.6310-34J-s. The velocity of light is 3108 m/sec. Which value is closest to the wavelength in nanometre of a quantum of lighr with frequency of 81015 /sec. A.510-18 B.410 C.310^7 D.2*10^-25