50278 + Interview Questions in Physics

1.	Two sources A and B are sounding notes of frequency 680 Hz. A listener moves from A to B with a constant velocity u. If the speed of sound is 340 m/s, what must be the value of u so that he hears 10 beats per second?
Answer» Two sources A and B are sounding notes of frequency $680 Hz$ . A listener moves from A to B with a constant velocity $u$ . If the speed of sound is $340 m/s$ , what must be the value of $u$ so that he hears $10$ beats per second?

Discussion

2.	The magnetic flux in a closed circuit, of resistance 20 Ω, varies with time (t) according to the equation ϕ=7t2−4t. Where ϕ is in webers and t is in seconds. The magnitude of the induced current at t=0.25 sec is,
Answer» The magnetic flux in a closed circuit, of resistance $20 Ω$ , varies with time $(t)$ according to the equation $ϕ = 7 t^{2} - 4 t$ . Where $ϕ$ is in $webers$ and $t$ is in $seconds$ . The magnitude of the induced current at $t = 0.25 sec$ is,

Discussion

3.	74.A long straight wire of radius a carries a steady current I. The current is uniformly distributed across its cross-section. The ratio of the magnetic field at a/4 inside and a/4 outside from the surface of wire is (1) 1:1 (2) 7:16 (3) 15:16 (4) 16:9
Answer» 74.A long straight wire of radius a carries a steady current I. The current is uniformly distributed across its cross-section. The ratio of the magnetic field at a/4 inside and a/4 outside from the surface of wire is (1) 1:1 (2) 7:16 (3) 15:16 (4) 16:9

Discussion

4.	The electric filed due to a uniformly charged spherical shell of charge 'Q' and radius 'R' at a distance 'r' is for r<R, and for r>R.
Answer» The electric filed due to a uniformly charged spherical shell of charge 'Q' and radius 'R' at a distance 'r' is for $r < R$ , and for $r > R$ .

Discussion

5.	Identical springs of steel and copper (Ysteel >Ycopper are equally stretched.(a) Less work is done on copper spring.(b) Less work is done on steel spring.(c) Equal work is done on both the springs.(d) Data is incomplete.
Answer» Identical springs of steel and copper (Ysteel >Ycopper are equally stretched.(a) Less work is done on copper spring.(b) Less work is done on steel spring.(c) Equal work is done on both the springs.(d) Data is incomplete.

Discussion

6.	A convex mirror of focal length f is placed at the origin with its reflecting surface towards the negative x axis. Chose the correct graph between v and u for 0≤u≤−∞ [The object is real
Answer» A convex mirror of focal length f is placed at the origin with its reflecting surface towards the negative x axis. Chose the correct graph between v and u for $0 \leq u \leq - \infty$ [The object is real

Discussion

7.	22.The magnetic field at the center of a current carrying circular could radius 10 cm is 55times the magnetic field at a point on its axis. The distance of the point from the centre of coil (in cm) is
Answer» 22.The magnetic field at the center of a current carrying circular could radius 10 cm is 55times the magnetic field at a point on its axis. The distance of the point from the centre of coil (in cm) is

Discussion

8.	57. What is meant by reference electron?Define electrochemical series?
Answer» 57. What is meant by reference electron?Define electrochemical series?

Discussion

9.	Electric flux of an charge placed at edge centre of cube is
Answer» Electric flux of an charge placed at edge centre of cube is

Discussion

10.	The moment of the force, →F = 4ˆi + 5ˆj −6ˆk at (2, 0, –3) about the point (2, –2, –2) is given by
Answer» The moment of the force, $\to F = 4 ˆ i + 5 ˆ j - 6 ˆ k$ at $(2, 0, - 3)$ about the point $(2, - 2, - 2)$ is given by

Discussion

11.	ball A is thrown vertically upward with a speed of 19.6m/s from the top edge of a high buildin as it passes the edge on th eway down a second ball B is thrown downward at 19.6 m/s and time t is what?
Answer» ball A is thrown vertically upward with a speed of 19.6m/s from the top edge of a high buildin as it passes the edge on th eway down a second ball B is thrown downward at 19.6 m/s and time t is what?

Discussion

12.	Find the angle of minimum deviation for an equilateral triangle glass prism (µ = root2)
Answer» Find the angle of minimum deviation for an equilateral triangle glass prism (µ = root2)

Discussion

13.	What is dimension?What is dimensional analysis?
Answer» What is dimension? What is dimensional analysis?

Discussion

14.	The position of the centre of mass of the T shaped plate from reference point O as shown in the figure will be:
Answer» The position of the centre of mass of the $T$ shaped plate from reference point $O$ as shown in the figure will be:

Discussion

15.	Match the block diagrams of objects marked x with their corresponding free body diagrams. Blocks have mass m, pulleys & strings are massless.
Answer» Match the block diagrams of objects marked x with their corresponding free body diagrams. Blocks have mass m, pulleys & strings are massless.

15.

Match the block diagrams of objects marked x with their corresponding free body diagrams. Blocks have mass m, pulleys & strings are massless.

Answer»

Match the block diagrams of objects marked x with their corresponding free body diagrams. Blocks have mass m, pulleys & strings are massless.

Discussion

16.	A steel wire of cross sectional area 0.05 cm2 is under a tension of 15 N. Find the decrease in the cross-sectional area. Young's modulus of steel = 2×1011N/m2 and Poisson's ratio = 0.3.
Answer» A steel wire of cross sectional area $0.05 {cm}^{2}$ is under a tension of $15 N$ . Find the decrease in the cross-sectional area. Young's modulus of steel = $2 \times 10^{11} {N/m}^{2}$ and Poisson's ratio = $0.3$ .

Discussion

17.	The distance between a frog and an insect is 12 m on a horizontal surface. The frog can jump with a maximum speed of √10 m/s. The minimum number of jumps required by the frog to catch the insect is [ Take g=10 m/s2 ]
Answer» The distance between a frog and an insect is $12 m$ on a horizontal surface. The frog can jump with a maximum speed of $\sqrt{10} m/s$ . The minimum number of jumps required by the frog to catch the insect is $[$ Take $g = 10 {m/s}^{2}$ $]$

Discussion

18.	The force is given in terms of time t and displacement x by the equation F=AcosBx+CsinDt. The dimensional formula of ADB is:
Answer» The force is given in terms of time $t$ and displacement $x$ by the equation $F = A cos B x + C sin D t$ . The dimensional formula of $\frac{A D}{B}$ is:

Discussion

19.	A circular plate of diameter 'a is kept in contactwith a square plate of side a as shown. Thedensity of the material and the thickness are sameeverywhere. The centre of mass of compositesystem will be3.a→ (1) Inside the circular plate(2) Inside the square plate(3) At the point of contact(4) Outside the systerm
Answer» A circular plate of diameter 'a is kept in contactwith a square plate of side a as shown. Thedensity of the material and the thickness are sameeverywhere. The centre of mass of compositesystem will be3.a→ (1) Inside the circular plate(2) Inside the square plate(3) At the point of contact(4) Outside the systerm

Discussion

20.	10.A tuning fork vibrating with a sonometer, having tension in the wire as T, produces 4 beats per sec. The beat frequency does not change when the tension in the wire changes to 1.21T. Find the frequency of the tuning fork assuming that the sonometer wire is vibrating in the same mode in both of the two cases.
Answer» 10.A tuning fork vibrating with a sonometer, having tension in the wire as T, produces 4 beats per sec. The beat frequency does not change when the tension in the wire changes to 1.21T. Find the frequency of the tuning fork assuming that the sonometer wire is vibrating in the same mode in both of the two cases.

Discussion

21.	Two monoatomic ideal gases 1 and 2 of molecular masses m1 and m2 respectively are enclosed in separate containers kept at the same temperature. The ratio of the speed of sound in gas 1 to that in gas 2 is given by
Answer» Two monoatomic ideal gases 1 and 2 of molecular masses $m_{1}$ and $m_{2}$ respectively are enclosed in separate containers kept at the same temperature. The ratio of the speed of sound in gas 1 to that in gas 2 is given by

Discussion

22.	A point charge +Q is placed just outside an imaginary hemispherical surface of radius R as shown in the figure. Which of the following statements is/are correct?
Answer» A point charge $+ Q$ is placed just outside an imaginary hemispherical surface of radius $R$ as shown in the figure. Which of the following statements is/are correct?

Discussion

23.	What is the importance of direction ?(Speed and velocity)
Answer» What is the importance of direction ? (Speed and velocity)

Discussion

24.	The equation of motion of a particle starting at t=0 is given by x=5sin(20t+π3), where x is in centimeter and t is in second. When does the particle come to rest for the second time?
Answer» The equation of motion of a particle starting at $t = 0$ is given by $x = 5 s i n (20 t + \frac{π}{3})$ , where $x$ is in centimeter and $t$ is in second. When does the particle come to rest for the second time?

Discussion

25.	A particle moves along the x−axis in such a way that its x− coordinates varies with time as x=1–2t+3t2. What will be its initial velocity?
Answer» A particle moves along the $x -$ axis in such a way that its $x -$ coordinates varies with time as $x = 1 - 2 t + 3 t^{2}$ . What will be its initial velocity?

Discussion

26.	what are ferrimagnetic , ferromagnetic , anti-ferromagnetic material and how are they different from paramagnetic and diamagnetic
Answer» what are ferrimagnetic , ferromagnetic , anti-ferromagnetic material and how are they different from paramagnetic and diamagnetic

Discussion

27.	The electric and the magnetic field, associated with an electromagnetic wave, propagating along the z-axis, can be represented by
Answer» The electric and the magnetic field, associated with an electromagnetic wave, propagating along the z-axis, can be represented by

Discussion

28.	A particle is executing linear simple harmonic motion of amplitude A. What fraction of the total energy is kinetic when the displacement is half the amplitude?
Answer» A particle is executing linear simple harmonic motion of amplitude A. What fraction of the total energy is kinetic when the displacement is half the amplitude?

Discussion

29.	Which of the following equations is a correct equation for the electrical circuit shown in the figure?
Answer» Which of the following equations is a correct equation for the electrical circuit shown in the figure?

Discussion

30.	Find the angle of the flint glass prism, which should be combined with a crown glass prism of 5∘ to give dispersion but no deviation.For crown glass: μv=1.523; μR=1.515For flint glass : μ′v=1.688; μ′R=1.650
Answer» Find the angle of the flint glass prism, which should be combined with a crown glass prism of $5^{\circ}$ to give dispersion but no deviation. For crown glass: $μ_{v} = 1.523; μ_{R} = 1.515$ For flint glass : $μ^{'}_{v} = 1.688; μ^{'}_{R} = 1.650$

Discussion

31.	Two balls of masses 5 kg and 10 kg are at the positions shown in figure. The track on which the balls move is frictionless. Initially, the 10 kg ball is kept at rest and the 5 kg ball is dropped with speed v from height 5 m. Assuming the collision between the balls is perfectly elastic, find the value of ′v′ such that the 10 kg ball reaches point ′C′.
Answer» Two balls of masses $5 kg$ and $10 kg$ are at the positions shown in figure. The track on which the balls move is frictionless. Initially, the $10 kg$ ball is kept at rest and the $5 kg$ ball is dropped with speed $v$ from height $5 m$ . Assuming the collision between the balls is perfectly elastic, find the value of $^{'} v^{'}$ such that the $10 kg$ ball reaches point $^{'} C^{'}$ .

Discussion

32.	Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage errors in the measurement of the current and the voltage difference are 3% each, then percentage error in the value of resistance of wire is:
Answer» Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage errors in the measurement of the current and the voltage difference are $3 %$ each, then percentage error in the value of resistance of wire is:

Discussion

33.	four point masses each of mass m are kept at the vertices of a square a point mass m is kept at the point of intersection of the diagonal of a square. what will be the force experienced by central mass m
Answer» four point masses each of mass m are kept at the vertices of a square a point mass m is kept at the point of intersection of the diagonal of a square. what will be the force experienced by central mass m

Discussion

34.	Electric power station 100 MW transmits power to a distant load through long and thin cables which of the following modes of transmission would result in less power wastage A) 20,000 V B) 200 V
Answer» Electric power station 100 MW transmits power to a distant load through long and thin cables which of the following modes of transmission would result in less power wastage A) 20,000 V B) 200 V

34.

Electric power station 100 MW transmits power to a distant load through long and thin cables which of the following modes of transmission would result in less power wastage A) 20,000 V B) 200 V

Answer»

Electric power station 100 MW transmits power to a distant load through long and thin cables which of the following modes of transmission would result in less power wastage

A) 20,000 V

B) 200 V

Discussion

35.	There is no couple acting when two bar magnets are placed coaxially separated by a distance because
Answer» There is no couple acting when two bar magnets are placed coaxially separated by a distance because

Discussion

36.	What is the excess pressure inside a bubble of soap solution of radius 5.00 mm, given that the surface tension of soap solution at the temperature (20 °C) is 2.50 × 10¯² N m¯¹ ? If an air bubble of the same dimension were formed at depth of 40.0 cm inside a container containing the soap solution (of relative density 1.20), what would be the pressure inside the bubble ? (1 atmospheric pressure is 1.01 × 105 Pa).
Answer» What is the excess pressure inside a bubble of soap solution of radius 5.00 mm, given that the surface tension of soap solution at the temperature (20 °C) is 2.50 × 10¯² N m¯¹ ? If an air bubble of the same dimension were formed at depth of 40.0 cm inside a container containing the soap solution (of relative density 1.20), what would be the pressure inside the bubble ? (1 atmospheric pressure is 1.01 × 105 Pa).

Discussion

37.	40.Define and drive the expression for electric susceptibility
Answer» 40.Define and drive the expression for electric susceptibility

Discussion

38.	The Sun is a hot plasma (ionized matter) with its inner core at a temperature exceeding 10⁷ K, and its outer surface at a temperature of about 6000 K. At these high temperatures, no substance remains in a solid or liquid phase. In what range do you expect the mass density of the Sun to be, in the range of densities of solids and liquids or gases ? Check if your guess is correct from the following data : mass of the Sun = 2.0 ×10³⁰ kg, radius of the Sun = 7.0 × 10⁸m.
Answer» The Sun is a hot plasma (ionized matter) with its inner core at a temperature exceeding 10⁷ K, and its outer surface at a temperature of about 6000 K. At these high temperatures, no substance remains in a solid or liquid phase. In what range do you expect the mass density of the Sun to be, in the range of densities of solids and liquids or gases ? Check if your guess is correct from the following data : mass of the Sun = 2.0 ×10³⁰ kg, radius of the Sun = 7.0 × 10⁸m.

Discussion

39.	A particle moves on a given straight line with a constant speed v. At a certain time it is at a point P on its straight line path. O is a fixed point. Show that →OP×→v is independent of the position P.
Answer» A particle moves on a given straight line with a constant speed v. At a certain time it is at a point P on its straight line path. O is a fixed point. Show that $\to O P \times \to v$ is independent of the position P.

Discussion

40.	Manning's roughness coefficient n is related to Darcy-Weisbach friction factor f as
Answer» Manning's roughness coefficient n is related to Darcy-Weisbach friction factor f as

Discussion

41.	46. a disc of mass m is connected to two springs K1 and K2 as shown. the time period of oscillation is
Answer» 46. a disc of mass m is connected to two springs K1 and K2 as shown. the time period of oscillation is

Discussion

42.	A body weighs 144N at the surface of earth.when it is taken to a height of h=3R,where R is radius of earth,it would weigh (1)48N (2)36N (3)9N (4) 16N
Answer» A body weighs 144N at the surface of earth.when it is taken to a height of h=3R,where R is radius of earth,it would weigh (1)48N (2)36N (3)9N (4) 16N

Discussion

43.	Two parallel plates A and B are joined together to form a compound plate. The thickness of the plates are 4.0 cm and 2.5 cm respectively and the area of cross-section is 100 cm2 for each plate.The thermal conductivities are KA=200 W/∘C m for the plate A and KB=400 W/∘C m for the plate B. The outer surface of the plate A is maintained at 100∘C and the outer surface of the plate B is maintained at 0∘C. Find the rate of heat flow through any cross-section.
Answer» Two parallel plates $A$ and $B$ are joined together to form a compound plate. The thickness of the plates are $4.0 cm$ and $2.5 cm$ respectively and the area of cross-section is $100 {cm}^{2}$ for each plate. The thermal conductivities are $K_{A} = 200 W /^{\circ} C m$ for the plate $A$ and $K_{B} = 400 W /^{\circ} C m$ for the plate $B$ . The outer surface of the plate $A$ is maintained at $100^{\circ} C$ and the outer surface of the plate B is maintained at $0^{\circ} C$ . Find the rate of heat flow through any cross-section.

Discussion

44.	A 1.0010-20 kg particle is vibrating under simple harmonic motion with a period of 110-5 s and with a maximum speed of 1*103 m/s.The maximum displacement of the particle from mean position
Answer» A 1.0010-20 kg particle is vibrating under simple harmonic motion with a period of 110-5 s and with a maximum speed of 1*103 m/s.The maximum displacement of the particle from mean position

Discussion

45.	The maximum energy of a deuteron coming out cyclotron is 20 MeV. The maximum energy of protonthat can be obtained from this accelerator is(a) 10 MeV(c) 30 MeV(b) 20 MeV(d) 40 MeV
Answer» The maximum energy of a deuteron coming out cyclotron is 20 MeV. The maximum energy of protonthat can be obtained from this accelerator is(a) 10 MeV(c) 30 MeV(b) 20 MeV(d) 40 MeV

Discussion

46.	A homogeneous disk with a radius R = 0.2m and a mass m = 5kg rotates about an axis passing through itscenter. The time dependence of the angular velocity of the disk rotation is expressed by the equation ω = A+Bt, whereB = 8rad/s2. Assume there is no friction. 1) Calculate the angular acceleration of the disk. 2) Calculate the tangentialforce applied to the disk rim. 3) Draw a drawing showing all the vector and scalar quantities used in the problem.
Answer» A homogeneous disk with a radius R = 0.2m and a mass m = 5kg rotates about an axis passing through its center. The time dependence of the angular velocity of the disk rotation is expressed by the equation ω = A+Bt, where B = 8rad/s 2 . Assume there is no friction. 1) Calculate the angular acceleration of the disk. 2) Calculate the tangential force applied to the disk rim. 3) Draw a drawing showing all the vector and scalar quantities used in the problem.

Discussion

47.	A pendulum of length 60 cm hanging from roof of an aeroplane .aeroplane is moving with a=4m/s^2 with horizontal find time period .give details of sign of a and g
Answer» A pendulum of length 60 cm hanging from roof of an aeroplane .aeroplane is moving with a=4m/s^2 with horizontal find time period .give details of sign of a and g

Discussion

48.	2. If the density ratio of O2 and H2 is 16:1, then ratio of their Vrms will be (1) 1:1 (2) 1:4 (3) 161 (4) 1:16
Answer» 2. If the density ratio of O2 and H2 is 16:1, then ratio of their Vrms will be (1) 1:1 (2) 1:4 (3) 161 (4) 1:16

Discussion

49.	a non conducting rod of length 2.2 m carries a negative charge of 3.8*10^-7 C spread uniformly over its length what is the magnitude of electric field neaar the mid point of the rod at a perpendicular distance 3.6 mm from the rod
Answer» a non conducting rod of length 2.2 m carries a negative charge of 3.8*10^-7 C spread uniformly over its length what is the magnitude of electric field neaar the mid point of the rod at a perpendicular distance 3.6 mm from the rod

Discussion

50.	A bullet fired at anangle of 30° with the horizontal hits the ground 3.0 km away. Byadjusting its angle of projection, can one hope to hit a target 5.0km away? Assume the muzzlespeed to the fixed, and neglectair resistance.
Answer» A bullet fired at an angle of 30° with the horizontal hits the ground 3.0 km away. By adjusting its angle of projection, can one hope to hit a target 5.0 km away? Assume the muzzle speed to the fixed, and neglect air resistance.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Two sources A and B are sounding notes of frequency 680 Hz. A listener moves from A to B with a constant velocity u. If the speed of sound is 340 m/s, what must be the value of u so that he hears 10 beats per second?

The magnetic flux in a closed circuit, of resistance 20 Ω, varies with time (t) according to the equation ϕ=7t2−4t. Where ϕ is in webers and t is in seconds. The magnitude of the induced current at t=0.25 sec is,

74.A long straight wire of radius a carries a steady current I. The current is uniformly distributed across its cross-section. The ratio of the magnetic field at a/4 inside and a/4 outside from the surface of wire is (1) 1:1 (2) 7:16 (3) 15:16 (4) 16:9

The electric filed due to a uniformly charged spherical shell of charge 'Q' and radius 'R' at a distance 'r' is for r&lt;R, and for r&gt;R.

Identical springs of steel and copper (Ysteel >Ycopper are equally stretched.(a) Less work is done on copper spring.(b) Less work is done on steel spring.(c) Equal work is done on both the springs.(d) Data is incomplete.

A convex mirror of focal length f is placed at the origin with its reflecting surface towards the negative x axis. Chose the correct graph between v and u for 0≤u≤−∞ [The object is real

22.The magnetic field at the center of a current carrying circular could radius 10 cm is 55times the magnetic field at a point on its axis. The distance of the point from the centre of coil (in cm) is

57. What is meant by reference electron?Define electrochemical series?

Electric flux of an charge placed at edge centre of cube is

The moment of the force, →F = 4ˆi + 5ˆj −6ˆk at (2, 0, –3) about the point (2, –2, –2) is given by

ball A is thrown vertically upward with a speed of 19.6m/s from the top edge of a high buildin as it passes the edge on th eway down a second ball B is thrown downward at 19.6 m/s and time t is what?

Find the angle of minimum deviation for an equilateral triangle glass prism (µ = root2)

What is dimension?What is dimensional analysis?

The position of the centre of mass of the T shaped plate from reference point O as shown in the figure will be:

Match the block diagrams of objects marked x with their corresponding free body diagrams. Blocks have mass m, pulleys &amp; strings are massless.

A steel wire of cross sectional area 0.05 cm2 is under a tension of 15 N. Find the decrease in the cross-sectional area. Young's modulus of steel = 2×1011N/m2 and Poisson's ratio = 0.3.

The distance between a frog and an insect is 12 m on a horizontal surface. The frog can jump with a maximum speed of √10 m/s. The minimum number of jumps required by the frog to catch the insect is [ Take g=10 m/s2 ]

The force is given in terms of time t and displacement x by the equation F=AcosBx+CsinDt. The dimensional formula of ADB is:

Two monoatomic ideal gases 1 and 2 of molecular masses m1 and m2 respectively are enclosed in separate containers kept at the same temperature. The ratio of the speed of sound in gas 1 to that in gas 2 is given by

A point charge +Q is placed just outside an imaginary hemispherical surface of radius R as shown in the figure. Which of the following statements is/are correct?

What is the importance of direction ?(Speed and velocity)

The equation of motion of a particle starting at t=0 is given by x=5sin(20t+π3), where x is in centimeter and t is in second. When does the particle come to rest for the second time?

A particle moves along the x−axis in such a way that its x− coordinates varies with time as x=1–2t+3t2. What will be its initial velocity?

what are ferrimagnetic , ferromagnetic , anti-ferromagnetic material and how are they different from paramagnetic and diamagnetic

The electric and the magnetic field, associated with an electromagnetic wave, propagating along the z-axis, can be represented by

A particle is executing linear simple harmonic motion of amplitude A. What fraction of the total energy is kinetic when the displacement is half the amplitude?

Which of the following equations is a correct equation for the electrical circuit shown in the figure?

Find the angle of the flint glass prism, which should be combined with a crown glass prism of 5∘ to give dispersion but no deviation.For crown glass: μv=1.523; μR=1.515For flint glass : μ′v=1.688; μ′R=1.650

Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage errors in the measurement of the current and the voltage difference are 3% each, then percentage error in the value of resistance of wire is:

four point masses each of mass m are kept at the vertices of a square a point mass m is kept at the point of intersection of the diagonal of a square. what will be the force experienced by central mass m

Electric power station 100 MW transmits power to a distant load through long and thin cables which of the following modes of transmission would result in less power wastage A) 20,000 V B) 200 V

There is no couple acting when two bar magnets are placed coaxially separated by a distance because

40.Define and drive the expression for electric susceptibility

A particle moves on a given straight line with a constant speed v. At a certain time it is at a point P on its straight line path. O is a fixed point. Show that →OP×→v is independent of the position P.

Manning's roughness coefficient n is related to Darcy-Weisbach friction factor f as

46. a disc of mass m is connected to two springs K1 and K2 as shown. the time period of oscillation is

A body weighs 144N at the surface of earth.when it is taken to a height of h=3R,where R is radius of earth,it would weigh (1)48N (2)36N (3)9N (4) 16N

A 1.00*10-20 kg particle is vibrating under simple harmonic motion with a period of 1*10-5 s and with a maximum speed of 1*103 m/s.The maximum displacement of the particle from mean position

The maximum energy of a deuteron coming out cyclotron is 20 MeV. The maximum energy of protonthat can be obtained from this accelerator is(a) 10 MeV(c) 30 MeV(b) 20 MeV(d) 40 MeV

A pendulum of length 60 cm hanging from roof of an aeroplane .aeroplane is moving with a=4m/s^2 with horizontal find time period .give details of sign of a and g

2. If the density ratio of O2 and H2 is 16:1, then ratio of their Vrms will be (1) 1:1 (2) 1:4 (3) 161 (4) 1:16

a non conducting rod of length 2.2 m carries a negative charge of 3.8*10^-7 C spread uniformly over its length what is the magnitude of electric field neaar the mid point of the rod at a perpendicular distance 3.6 mm from the rod

A bullet fired at anangle of 30° with the horizontal hits the ground 3.0 km away. Byadjusting its angle of projection, can one hope to hit a target 5.0km away? Assume the muzzlespeed to the fixed, and neglectair resistance.

The electric filed due to a uniformly charged spherical shell of charge 'Q' and radius 'R' at a distance 'r' is for r<R, and for r>R.

Match the block diagrams of objects marked x with their corresponding free body diagrams. Blocks have mass m, pulleys & strings are massless.

A 1.0010-20 kg particle is vibrating under simple harmonic motion with a period of 110-5 s and with a maximum speed of 1*103 m/s.The maximum displacement of the particle from mean position