50278 + Interview Questions in Physics

1.	A magnet is suspended in the magnetic meridian with an untwisted wire. The upper end of the wire is rotated through 180∘ to deflect the magnet by 30∘ from the magnetic meridian. When this magnet is replaced by another magnet, the upper end of the wire is rotated through 270∘ to deflect the magnet 30∘ from the magnetic meridian. The ratio of magnetic moments of magnets is
Answer» A magnet is suspended in the magnetic meridian with an untwisted wire. The upper end of the wire is rotated through $180^{\circ}$ to deflect the magnet by $30^{\circ}$ from the magnetic meridian. When this magnet is replaced by another magnet, the upper end of the wire is rotated through $270^{\circ}$ to deflect the magnet $30^{\circ}$ from the magnetic meridian. The ratio of magnetic moments of magnets is

Discussion

2.	Two balls A and B of masses 2 kg each are moving with speeds 1 m/s and 2 m/s on a frictionless surface. After colliding, the ball A returns back with speed 0.5 m/s, then the impulse of reformation of ball B is
Answer» Two balls $A$ and $B$ of masses $2 kg$ each are moving with speeds $1 m/s$ and $2 m/s$ on a frictionless surface. After colliding, the ball $A$ returns back with speed $0.5 m/s$ , then the impulse of reformation of ball $B$ is

Discussion

3.	Derive all the eqations of the second law of motion.
Answer» Derive all the eqations of the second law of motion.

Discussion

4.	A ball of mass 0.2 kg rests on a vertical of height 5 m. A bullet of mass 0.01 kg, travelling with a velocity V m/s in a horizontal direction, hits the centre of the ball. After the collision, the ball and bullet travel independently. The ball hits the ground at a distance of 20 m and the bullet at a distance of 100 m from the foot of the post. The initial velocity V of the bullet is
Answer» A ball of mass 0.2 kg rests on a vertical of height 5 m. A bullet of mass 0.01 kg, travelling with a velocity V m/s in a horizontal direction, hits the centre of the ball. After the collision, the ball and bullet travel independently. The ball hits the ground at a distance of 20 m and the bullet at a distance of 100 m from the foot of the post. The initial velocity V of the bullet is

Discussion

5.	A projectile is fixed at an angle 60∘ with horizontal. Ratio of initial K.E. to K.E. when velocity vector of projectile makes an angle 15∘ with velocity of projection is
Answer» A projectile is fixed at an angle $60^{\circ}$ with horizontal. Ratio of initial K.E. to K.E. when velocity vector of projectile makes an angle $15^{\circ}$ with velocity of projection is

Discussion

6.	What is the angle of deviation for a light ray passing through a glass slab?
Answer» What is the angle of deviation for a light ray passing through a glass slab?

Discussion

7.	The radiation emitted when an electron jumps from n=4 to n=3 in a Li++ ion (atomic no. Z=3 ) falls on a metal surface to produce photoelectron. When the photoelectron with maximum kinetic energy is made to move perpendicular to a uniform magnetic field of 2×10−4 T, it follows a circular path of radius √9.11.6 cm. The work function of metal (in eV ) is (given mass of electron m=9.1×10−31 kg and charge on electron=−1.6×10−19 C
Answer» The radiation emitted when an electron jumps from $n = 4$ to $n = 3$ in a $L i^{+ +} i o n$ (atomic no. $Z = 3$ ) falls on a metal surface to produce photoelectron. When the photoelectron with maximum kinetic energy is made to move perpendicular to a uniform magnetic field of $2 \times 10^{- 4} T,$ it follows a circular path of radius $\sqrt{\frac{9.1}{1.6}} c m .$ The work function of metal (in eV ) is (given mass of electron $m = 9.1 \times 10^{- 31} k g and charge on electron = - 1.6 \times 10^{- 19} C$

Discussion

8.	An inductor (L = 0.03H) and a resistor (r = 0.15 kW) are connected in series to a battery of 15V EMF in a circuit shown below. The key K1 has been kept closed for a long time. Then at t = 0, K1 is opened and key K2 is closed simultaneously. At t = 1ms, the current in the circuit will be: (e5 ≅ 150)
Answer» An inductor (L = 0.03H) and a resistor (r = 0.15 kW) are connected in series to a battery of 15V EMF in a circuit shown below. The key K₁ has been kept closed for a long time. Then at t = 0, K₁ is opened and key K₂ is closed simultaneously. At t = 1ms, the current in the circuit will be: (e⁵ ≅ 150)

Discussion

9.	n identical cubes each of mass m and side l are on a horizontal surface. Then the minimum amount of work done to arrange them one over another in a vertical stack is
Answer» $n$ identical cubes each of mass $m$ and side $l$ are on a horizontal surface. Then the minimum amount of work done to arrange them one over another in a vertical stack is

Discussion

10.	A R-L cicuit is switched on at t=0. In circuit L=4H , R= 1 ohm & V= 6 volts .Power dissipated in the circuit at time equal to one time constant is
Answer» A R-L cicuit is switched on at t=0. In circuit L=4H , R= 1 ohm & V= 6 volts .Power dissipated in the circuit at time equal to one time constant is

Discussion

11.	Two particles of equal masses m go around a circle of radius R under the action of their mutual gravitational attraction. The speed of each particle is
Answer» Two particles of equal masses $m$ go around a circle of radius $R$ under the action of their mutual gravitational attraction. The speed of each particle is

Discussion

12.	Which type of voids are occupied by 'x' atoms:
Answer» Which type of voids are occupied by 'x' atoms:

Discussion

13.	Consider a rectangular tank of size l×b filled with a liquid of density ρ to a height H as shown in the figure. Find the ratio of the force on the base and the vertical wall of the tank.
Answer» Consider a rectangular tank of size $l \times b$ filled with a liquid of density $ρ$ to a height $H$ as shown in the figure. Find the ratio of the force on the base and the vertical wall of the tank.

Discussion

14.	At what angle should a ray of light be incident on one of the face of an equilateral prism, so that the emergent ray may graze the surface of the prism having refractive index (μ=2) ?
Answer» At what angle should a ray of light be incident on one of the face of an equilateral prism, so that the emergent ray may graze the surface of the prism having refractive index $(μ = 2)$ ?

Discussion

15.	Two ships are 60 km apart on North-South vertical at an instant as shown in the figure. The one farther North is streaming South at 30√3 km/hr and the other is streaming East at 30 km/hr. What is the time taken by the ships to reach the closest approach?
Answer» Two ships are $60 km$ apart on North-South vertical at an instant as shown in the figure. The one farther North is streaming South at $30 \sqrt{3} km/hr$ and the other is streaming East at $30 km/hr$ . What is the time taken by the ships to reach the closest approach?

Discussion

16.	A bus travels the first one third distance at a speed of 20 km h–1, and the next two-third distance at a speed of 30 km h–1. What is the average velocity of the bus?
Answer» A bus travels the first one third distance at a speed of 20 km h–1, and the next two-third distance at a speed of 30 km h–1. What is the average velocity of the bus?

Discussion

17.	A tapered circualr rod of diameter varying from 30mm to 15mm is connected to another circular rod of diameter 15mm as shown in figure. Both bars are of same material with the modulus of elasticity E=2×105N/mm2 and subjected to axial load of 100kN, then deflection of a bar at the free end is ____ mm 9.9
Answer» A tapered circualr rod of diameter varying from $30 m m$ to $15 m m$ is connected to another circular rod of diameter $15 m m$ as shown in figure. Both bars are of same material with the modulus of elasticity $E = 2 \times 10^{5} N / m m^{2}$ and subjected to axial load of $100 k N$ , then deflection of a bar at the free end is ____ $m m$ 9.9

Discussion

18.	89. A person stands on a spring balance at the equator (a)by what fraction is the balance reading less than his true weight? (b)if the speed of earth rotation is increased by such an amount so that the balance reading is half the true weight,what will be the length of the day in this case?
Answer» 89. A person stands on a spring balance at the equator (a)by what fraction is the balance reading less than his true weight? (b)if the speed of earth rotation is increased by such an amount so that the balance reading is half the true weight,what will be the length of the day in this case?

Discussion

19.	Electric field in the region is given by →E=(2^i+3^j+4^k)NC−1 . The flux associated with a square plate of side 5 cm as shown in the figure is
Answer» Electric field in the region is given by $\to E = (2^i + 3^j + 4^k) {NC}^{- 1}$ . The flux associated with a square plate of side $5 cm$ as shown in the figure is

Discussion

20.	A plane flying horizontally at 100 m/s releases an object which reaches the ground in 10 s. What will be the angle from horizontal, at which it hits the ground? Take g=10 m/s2.
Answer» A plane flying horizontally at $100 m/s$ releases an object which reaches the ground in $10 s$ . What will be the angle from horizontal, at which it hits the ground? Take $g = 10 {m/s}^{2}$ .

Discussion

21.	If aretwo collinear vectors, then which of the following are incorrect:A. ,for some scalar λB. C. therespective components of areproportionalD. boththe vectorshavesame direction, but different magnitudes
Answer» If are two collinear vectors, then which of the following are incorrect: A. , for some scalar λ B. C. the respective components of are proportional D. both the vectors have same direction, but different magnitudes

21.

If aretwo collinear vectors, then which of the following are incorrect:A. ,for some scalar λB. C. therespective components of areproportionalD. boththe vectorshavesame direction, but different magnitudes

Answer»

If
are
two collinear vectors, then which of the following are incorrect:

A. ,
for some scalar λ

B.

C. the
respective components of
are
proportional

D. both
the vectors
have
same direction, but different magnitudes

Discussion

22.	If a pressure of 378 atm is exterd on a cicrular cross section of radius 0.1 mm , what is the force exerted on the area ?
Answer» If a pressure of 378 atm is exterd on a cicrular cross section of radius 0.1 mm , what is the force exerted on the area ?

Discussion

23.	What is the electric field at a point P(at dis†an ce 3r from centre) due to induced charge on the outer surface of a conducting sphere if a charge q is kept inside the sphere ^{}at r/2 from the centre.(r is radius of sphere)
Answer» What is the electric field at a point P(at dis†an ce 3r from centre) due to induced charge on the outer surface of a conducting sphere if a charge q is kept inside the sphere ^{}at r/2 from the centre.(r is radius of sphere)

Discussion

24.	A flat coil of 500 turns each of area 50 cm2 rotates in a uniform magnetic field of 0.14 Wb/m2 about an axis normal to the field at an angular speed of 150 rad s−1. The coil has a resistance of 5 Ω. The induced e.m.f is applied to an external resistance of 10 Ω. The peak current through the resistance is _________A.
Answer» A flat coil of $500$ turns each of area $50 {cm}^{2}$ rotates in a uniform magnetic field of $0.14 {Wb/m}^{2}$ about an axis normal to the field at an angular speed of $150 {rad s}^{- 1}$ . The coil has a resistance of $5 Ω$ . The induced e.m.f is applied to an external resistance of $10 Ω$ . The peak current through the resistance is _________ $A$ .

Discussion

25.	Draw a graph from the following data. Draw tangents at x = 2, 4, 6 and 8. Find the slopes of these tangents. Verify that the curve drawn is y=2x2 and the slope of tangent is tan θ=dydx=4x. x12345678910y281832507298128162200
Answer» Draw a graph from the following data. Draw tangents at x = 2, 4, 6 and 8. Find the slopes of these tangents. Verify that the curve drawn is y= $2 x^{2}$ and the slope of tangent is tan $θ = \frac{d y}{d x} = 4 x$ . $\begin{matrix} x & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 y & 2 & 8 & 18 & 32 & 50 & 72 & 98 & 128 & 162 & 200 \end{matrix}$

25.

Draw a graph from the following data. Draw tangents at x = 2, 4, 6 and 8. Find the slopes of these tangents. Verify that the curve drawn is y=2x2 and the slope of tangent is tan θ=dydx=4x. x12345678910y281832507298128162200

Answer»

Draw a graph from the following data. Draw tangents at x = 2, 4, 6 and 8. Find the slopes of these tangents. Verify that the curve drawn is y= $2 x^{2}$ and the slope of tangent is tan $θ = \frac{d y}{d x} = 4 x$ .

$\begin{matrix} x & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 y & 2 & 8 & 18 & 32 & 50 & 72 & 98 & 128 & 162 & 200 \end{matrix}$

Discussion

26.	A block of mass m moving with velocity v0 on a smooth horizontal surface hits the spring of constant K as shown. The maximum compression in spring is
Answer» A block of mass $m$ moving with velocity $v_{0}$ on a smooth horizontal surface hits the spring of constant $K$ as shown. The maximum compression in spring is

Discussion

27.	1.A particle of mass m is released from rest and follows a parabolic path as shown Assuming that the displacement of mass from the origin is small Find equational relation between position and time. Also show position time graph
Answer» 1.A particle of mass m is released from rest and follows a parabolic path as shown Assuming that the displacement of mass from the origin is small Find equational relation between position and time. Also show position time graph

Discussion

28.	Two uniform ropes having linear mass densities m and 4m are joined to form a closed loop. The loop is hanging over a fixed frictionless small pulley with the lighter rope above and denser rope below, as shown in the figure. (Figure represents equilibrium position). Now if point A (joint) is slightly displaced in downward direction and released, it is found that the loop performs SHM. Find the time period of oscillation. [Take l=1504π2 m,g=10 m/s2]
Answer» Two uniform ropes having linear mass densities $m$ and $4 m$ are joined to form a closed loop. The loop is hanging over a fixed frictionless small pulley with the lighter rope above and denser rope below, as shown in the figure. (Figure represents equilibrium position). Now if point $A$ (joint) is slightly displaced in downward direction and released, it is found that the loop performs SHM. Find the time period of oscillation. $[Take l = \frac{150}{4 π^{2}} m, g = 10 {m/s}^{2}]$

Discussion

29.	“Business environment includes both specific and general forces.” List any four general forces.
Answer» “Business environment includes both specific and general forces.” List any four general forces.

Discussion

30.	There is formation of layer of snow x cm thick on water, when the temperature of air is −θo C (less than freezing point). The thickness of layer increases from x to y in the time t, then the value of t is given by
Answer» There is formation of layer of snow x cm thick on water, when the temperature of air is $- θ^{o} C$ (less than freezing point). The thickness of layer increases from x to y in the time t, then the value of t is given by

Discussion

31.	The ILD for member U2L2 in the shown below is [Take compression positive]
Answer» The ILD for member $U_{2} L_{2}$ in the shown below is [Take compression positive]

Discussion

32.	A bullet is fired normally on an immovable wooden plank. It loses 25% of its momentum in penetrating a thickness of 3.5 cm. Find the total thickness (in cm) penetrated by the bullet.
Answer» A bullet is fired normally on an immovable wooden plank. It loses 25% of its momentum in penetrating a thickness of 3.5 cm. Find the total thickness (in cm) penetrated by the bullet.

Discussion

33.	A particle on a stretched string supporting a travelling wave, takes 5.0 ms to move from its mean position to the extreme position. The distance between two consecutive particles, which are at their mean positions, is 2.0 cm. Find the frequency, the wavelength and the wave speed.
Answer» A particle on a stretched string supporting a travelling wave, takes 5.0 ms to move from its mean position to the extreme position. The distance between two consecutive particles, which are at their mean positions, is 2.0 cm. Find the frequency, the wavelength and the wave speed.

Discussion

34.	The energy released by the fission of one uranium atom is 200 MeV. The number of fissions per second required to produce 3.2 W of power is
Answer» The energy released by the fission of one uranium atom is 200 MeV. The number of fissions per second required to produce 3.2 W of power is

Discussion

35.	The first four ionization energy values of an element are 191, 578, 872 and 5962 kcal. The number ofvalence electrons in the element is 1) 2)2 3)3 4)4
Answer» The first four ionization energy values of an element are 191, 578, 872 and 5962 kcal. The number ofvalence electrons in the element is 1) 2)2 3)3 4)4

Discussion

36.	A particle is projected vertically upward from the surface of earth (radius R) with a kinetic energy equal to half of the minimum value needed for it to escape. The height to which it rises above the surface of earth is
Answer» A particle is projected vertically upward from the surface of earth $($ radius $R)$ with a kinetic energy equal to half of the minimum value needed for it to escape. The height to which it rises above the surface of earth is

Discussion

37.	F.V20(4)The force required to row a boat at constantvelocity is proportional to square of its speed. If aspeed of v km/h requires 4 kW, how much powerdoes a speed of 2v km/h require?1) 8 kW) 16 kW) 24 kW32 kW20
Answer» F.V20(4)The force required to row a boat at constantvelocity is proportional to square of its speed. If aspeed of v km/h requires 4 kW, how much powerdoes a speed of 2v km/h require?1) 8 kW) 16 kW) 24 kW32 kW20

Discussion

38.	A body A is dropped from the top of a tower. Ifanother identical body B is projected horizontallyfrom the same point at the same instant, then(1) Both A and B will reach the groundsimultaneously(2) A will reach the ground earlier than B(3) B will reach the ground earlier than A(4) Time of fall depends on their masses
Answer» A body A is dropped from the top of a tower. If another identical body B is projected horizontally from the same point at the same instant, then (1) Both A and B will reach the ground simultaneously (2) A will reach the ground earlier than B (3) B will reach the ground earlier than A (4) Time of fall depends on their masses

Discussion

39.	26.What is dimension of permeability of free space and permitivity of free space the power minus half
Answer» 26.What is dimension of permeability of free space and permitivity of free space the power minus half

Discussion

40.	A nucleus of mass number 220 decays by α - decay. The energy released in the reaction is 5eV. The kinetic energy of an α -particle is
Answer» A nucleus of mass number 220 decays by $α$ - decay. The energy released in the reaction is 5eV. The kinetic energy of an $α$ -particle is

Discussion

41.	A particle is thrown with the speed u at an angle alpha with the horizontal . When the velocity of particle makes an beta with the horizontal what will be it's speed?
Answer» A particle is thrown with the speed u at an angle alpha with the horizontal . When the velocity of particle makes an beta with the horizontal what will be it's speed?

Discussion

42.	A proton and an alpha particle, accumulated through same potential difference, enter a region of uniform magnetic field with their velocities perpendicular to the field. Compare the radio of circular path followed by them. Note - let mv = 2mqv
Answer» A proton and an alpha particle, accumulated through same potential difference, enter a region of uniform magnetic field with their velocities perpendicular to the field. Compare the radio of circular path followed by them. Note - let mv = 2mqv

Discussion

43.	what is the main difference between (distance and displacement) and speed and velocity)?
Answer» what is the main difference between (distance and displacement) and speed and velocity)?

Discussion

44.	to correct chromatic aberration if we are using combination of two lenses of same material we should keep there separationf2-f1f1+f2f1+f2/2in contact
Answer» to correct chromatic aberration if we are using combination of two lenses of same material we should keep there separation f2-f1 f1+f2 f1+f2/2 in contact

Discussion

45.	Find the radius of circle in which a central angle of 90∘ intercepts an arc of length 27.632 cm (use π=3.14)
Answer» Find the radius of circle in which a central angle of $90^{\circ}$ intercepts an arc of length $27.632 cm$ (use $π = 3.14$ )

Discussion

46.	In the vicinity of the triple point, the vapour pressures of liquid and solid ammonia are respectively given by lnP=15.16−3063/TandlnP=18.70−3754Twhere P is in atmospheric and T is in kelvin. What is thetemperature at the triple point? 195.2
Answer» In the vicinity of the triple point, the vapour pressures of liquid and solid ammonia are respectively given by $l n P = 15.16 - 3063 / T and l n P = 18.70 - 3754 T$ where P is in atmospheric and T is in kelvin. What is the temperature at the triple point? 195.2

Discussion

47.	The wavelength of maximum emitted energy of a body at 700 K is 4.08 μ m. If the temperature of the body is raised to 1400 K, the wavelength of maximum emitted energy will be
Answer» The wavelength of maximum emitted energy of a body at 700 K is 4.08 $μ$ m. If the temperature of the body is raised to 1400 K, the wavelength of maximum emitted energy will be

Discussion

48.	X7. A certain metal when irradiated with light3.2 1016 Hz) emits photo electrons with(vtwice kinetic energy as did photo electronswhen the same metal is irradiated by light(v 2.0 x 1016 Hz). Calculate v of electron?5(1) 1.2 104 Hz(2) 8 x 1015 Hz(4) 4x1012 Hz(3) 1.2x 1016 Hz
Answer» X 7. A certain metal when irradiated with light 3.2 1016 Hz) emits photo electrons with (v twice kinetic energy as did photo electrons when the same metal is irradiated by light (v 2.0 x 1016 Hz). Calculate v of electron? 5 (1) 1.2 104 Hz (2) 8 x 1015 Hz (4) 4x1012 Hz (3) 1.2x 1016 Hz

Discussion

49.	A gas mixture contains 1 g H2 and 1 g He. If temperature of gas mixture is increased from 0∘C to 100∘C at isobaric process, then find the heat given to the gas mixture. [γHe=53,γHe=75,R=2 cal/mol-K]
Answer» A gas mixture contains $1 g H_{2}$ and $1 g He$ . If temperature of gas mixture is increased from $0^{\circ} C$ to $100^{\circ} C$ at isobaric process, then find the heat given to the gas mixture. $[γ_{H e} = \frac{5}{3}, γ_{H e} = \frac{7}{5}, R = 2 cal/mol-K]$

Discussion

50.	A: When a man is walking on a rough road, the work done by frictional force is zero. R: Frictional force acts in the direction of the motion of the man in this case. (1) Assertion and reason are true and reason is the correct explanation of assertion (2) Assertion and reason are true but reason is not the correct explanation of the assertion (3) Assrertion is true but reason is false (4) Assertion is fals
Answer» A: When a man is walking on a rough road, the work done by frictional force is zero. R: Frictional force acts in the direction of the motion of the man in this case. (1) Assertion and reason are true and reason is the correct explanation of assertion (2) Assertion and reason are true but reason is not the correct explanation of the assertion (3) Assrertion is true but reason is false (4) Assertion is fals

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Two balls A and B of masses 2 kg each are moving with speeds 1 m/s and 2 m/s on a frictionless surface. After colliding, the ball A returns back with speed 0.5 m/s, then the impulse of reformation of ball B is

Derive all the eqations of the second law of motion.

A projectile is fixed at an angle 60∘ with horizontal. Ratio of initial K.E. to K.E. when velocity vector of projectile makes an angle 15∘ with velocity of projection is

What is the angle of deviation for a light ray passing through a glass slab?

n identical cubes each of mass m and side l are on a horizontal surface. Then the minimum amount of work done to arrange them one over another in a vertical stack is

A R-L cicuit is switched on at t=0. In circuit L=4H , R= 1 ohm & V= 6 volts .Power dissipated in the circuit at time equal to one time constant is

Two particles of equal masses m go around a circle of radius R under the action of their mutual gravitational attraction. The speed of each particle is

Which type of voids are occupied by 'x' atoms:

Consider a rectangular tank of size l×b filled with a liquid of density ρ to a height H as shown in the figure. Find the ratio of the force on the base and the vertical wall of the tank.

At what angle should a ray of light be incident on one of the face of an equilateral prism, so that the emergent ray may graze the surface of the prism having refractive index (μ=2) ?

Two ships are 60 km apart on North-South vertical at an instant as shown in the figure. The one farther North is streaming South at 30√3 km/hr and the other is streaming East at 30 km/hr. What is the time taken by the ships to reach the closest approach?

A bus travels the first one third distance at a speed of 20 km h–1, and the next two-third distance at a speed of 30 km h–1. What is the average velocity of the bus?

89. A person stands on a spring balance at the equator (a)by what fraction is the balance reading less than his true weight? (b)if the speed of earth rotation is increased by such an amount so that the balance reading is half the true weight,what will be the length of the day in this case?

Electric field in the region is given by →E=(2^i+3^j+4^k)NC−1 . The flux associated with a square plate of side 5 cm as shown in the figure is

A plane flying horizontally at 100 m/s releases an object which reaches the ground in 10 s. What will be the angle from horizontal, at which it hits the ground? Take g=10 m/s2.

If aretwo collinear vectors, then which of the following are incorrect:A. ,for some scalar λB. C. therespective components of areproportionalD. boththe vectorshavesame direction, but different magnitudes

If a pressure of 378 atm is exterd on a cicrular cross section of radius 0.1 mm , what is the force exerted on the area ?

What is the electric field at a point P(at dis†an ce 3r from centre) due to induced charge on the outer surface of a conducting sphere if a charge q is kept inside the sphere ^{}at r/2 from the centre.(r is radius of sphere)

Draw a graph from the following data. Draw tangents at x = 2, 4, 6 and 8. Find the slopes of these tangents. Verify that the curve drawn is y=2x2 and the slope of tangent is tan θ=dydx=4x. x12345678910y281832507298128162200

A block of mass m moving with velocity v0 on a smooth horizontal surface hits the spring of constant K as shown. The maximum compression in spring is

1.A particle of mass m is released from rest and follows a parabolic path as shown Assuming that the displacement of mass from the origin is small Find equational relation between position and time. Also show position time graph

“Business environment includes both specific and general forces.” List any four general forces.

There is formation of layer of snow x cm thick on water, when the temperature of air is −θo C (less than freezing point). The thickness of layer increases from x to y in the time t, then the value of t is given by

The ILD for member U2L2 in the shown below is [Take compression positive]

A bullet is fired normally on an immovable wooden plank. It loses 25% of its momentum in penetrating a thickness of 3.5 cm. Find the total thickness (in cm) penetrated by the bullet.

A particle on a stretched string supporting a travelling wave, takes 5.0 ms to move from its mean position to the extreme position. The distance between two consecutive particles, which are at their mean positions, is 2.0 cm. Find the frequency, the wavelength and the wave speed.

The energy released by the fission of one uranium atom is 200 MeV. The number of fissions per second required to produce 3.2 W of power is

The first four ionization energy values of an element are 191, 578, 872 and 5962 kcal. The number ofvalence electrons in the element is 1) 2)2 3)3 4)4

A particle is projected vertically upward from the surface of earth (radius R) with a kinetic energy equal to half of the minimum value needed for it to escape. The height to which it rises above the surface of earth is

F.V20(4)The force required to row a boat at constantvelocity is proportional to square of its speed. If aspeed of v km/h requires 4 kW, how much powerdoes a speed of 2v km/h require?1) 8 kW) 16 kW) 24 kW32 kW20

26.What is dimension of permeability of free space and permitivity of free space the power minus half

A nucleus of mass number 220 decays by α - decay. The energy released in the reaction is 5eV. The kinetic energy of an α -particle is

A particle is thrown with the speed u at an angle alpha with the horizontal . When the velocity of particle makes an beta with the horizontal what will be it's speed?

A proton and an alpha particle, accumulated through same potential difference, enter a region of uniform magnetic field with their velocities perpendicular to the field. Compare the radio of circular path followed by them. Note - let mv = 2mqv

what is the main difference between (distance and displacement) and speed and velocity)?

to correct chromatic aberration if we are using combination of two lenses of same material we should keep there separationf2-f1f1+f2f1+f2/2in contact

Find the radius of circle in which a central angle of 90∘ intercepts an arc of length 27.632 cm (use π=3.14)

In the vicinity of the triple point, the vapour pressures of liquid and solid ammonia are respectively given by lnP=15.16−3063/TandlnP=18.70−3754Twhere P is in atmospheric and T is in kelvin. What is thetemperature at the triple point? 195.2

The wavelength of maximum emitted energy of a body at 700 K is 4.08 μ m. If the temperature of the body is raised to 1400 K, the wavelength of maximum emitted energy will be

X7. A certain metal when irradiated with light3.2 1016 Hz) emits photo electrons with(vtwice kinetic energy as did photo electronswhen the same metal is irradiated by light(v 2.0 x 1016 Hz). Calculate v of electron?5(1) 1.2 104 Hz(2) 8 x 1015 Hz(4) 4x1012 Hz(3) 1.2x 1016 Hz

A gas mixture contains 1 g H2 and 1 g He. If temperature of gas mixture is increased from 0∘C to 100∘C at isobaric process, then find the heat given to the gas mixture. [γHe=53,γHe=75,R=2 cal/mol-K]