Physics chapter 4 – QBank L2
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Question 1 of 45
1. Question
If the length of the second’s hand in a stop clock is 3 cm. then find the angular velocity and linear velocity of the tip.
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Question 2 of 45
2. Question
A projectile projected at an angle \(30^\circ\) from the horizontal has a range R. When the angle of projection at the same initial velocity be \(60^\circ\), then define the range.
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Question 3 of 45
3. Question
If a body is projected at such an angle that the horizontal range is 3 times the greatest height. Then find the angle of projection.
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Question 4 of 45
4. Question
If \(‘\mu’\) is the coefficient of friction, find the condition for no skidding for a body moving in a circular path.
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Question 5 of 45
5. Question
A particle is moving in a horizontal circle with constant speed. Which constant factor it has?
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Question 6 of 45
6. Question
If time of flight of a projectile is 10 seconds, range is 500 meters: then find the maximum height attained by it.
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Question 7 of 45
7. Question
From the following figure a body of mass ‘m’ is moving with a uniform speed ‘V’ along a circle of radius ‘r’. Then find the change in velocity while going from A to B.
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Question 8 of 45
8. Question
Statement 1: If the velocity’ of projection of a body is made ’n’ times, its time of flight becomes ‘n’ times.
Statement 2: The range of projectile is independent of the initial velocity of a body.CorrectIncorrect 
Question 9 of 45
9. Question
At the top of the trajectory of a projectile, the directions of its velocity and acceleration are.
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Question 10 of 45
10. Question
At which point in a vertical circle of radius T and in its path a particle has tension equal to zero, if it is just able to complete the vertical circle?
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Question 11 of 45
11. Question
The coefficient of friction between the tyres and the road is 0.25. Find the maximum speed with which a car can be driven round a curve of radius 40 m without skidding. \((Assume g=10 ms^{2})\)
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Question 12 of 45
12. Question
Statement 1: A body of mass 1 kg is making 1 rps in a circle of radius 1m and \(4 \pi^{2}N\) is the centrifugal force acting on it.
Statement 2: \(F = \frac{mv^{2}}{r}\) gives the centrifugal force.CorrectIncorrect 
Question 13 of 45
13. Question
If the coefficient of friction between the tyres and the road is 0.4, then find the maximum speed of a car on a roadturn of radius 30 m.
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Question 14 of 45
14. Question
A ball is projected with kinetic energy E at an angle of 45° to the horizontal. What will be the ball’s kinetic energy at the highest point during its flight?
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Question 15 of 45
15. Question
Statement 1: Centrifugal forces and centripetal forces never cancel out.
Statement 2: At the same time, they do not act.CorrectIncorrect 
Question 16 of 45
16. Question
Statement 1: An athlete throws the projectile at an angle slightly more than 45°, in javelin throw.
Statement 2: Maximum range is independent of angle of projection.CorrectIncorrect 
Question 17 of 45
17. Question
If a stone is just released from the window of a train moving along a horizontal straight track, then determine the path taken by the stone while hitting the ground.
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Question 18 of 45
18. Question
In Fig., two long parallel wires carry equal currents in opposite directions. Point O is situated midway between the wires and XY plane contains the two wires and the position Zaxis comes normally out of the plane of paper, the magnetic field B at O is nonzero along
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Question 19 of 45
19. Question
If the electric amplitude of the electromagnetic wave is \(5 V m^{1}\), what will be its magnetic amplitude?
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Question 20 of 45
20. Question
When a mass M is attached to the spring of force constant k. then the spring stretches by ‘l’. If the mass oscillates with amplitude ‘l’, then find the maximum potential energy stored in the spring.
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Question 21 of 45
21. Question
A negatively charged plate has charge density of \(2 \times 10^{6} C/m^{2}.\) The initial distance of an electron which is moving towards plate, cannot strike the plate, if it is having energy of 200 ev is
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Question 22 of 45
22. Question
Statement 1: The force of action and reaction do not cancel each other whereas each produces its own effect.
Statement 2: The force of action and reaction are equal and opposite.CorrectIncorrect 
Question 23 of 45
23. Question
There are 8 equal resistances (say R). Two are connected in parallel, such four groups are connected in series, then what will be the total resistance of the system?
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Question 24 of 45
24. Question
A metal rod of length 10 cm and a rectangular crosssection of \(1 cm \times \frac{1}{2}cm\) is connected to a battery across opposite faces. The resistance will be
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Question 25 of 45
25. Question
The plates of a parallel plate capacitor of capacity \(50 \mu C\) are charged to a potential of 100 volts and then separated from each other so that distance between them is doubled. How much energy is required for the process?
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Question 26 of 45
26. Question
If \(V_{rms}\) is the root mean square velocity of the molecules of a gas and \(V_{s}\) the velocity of sound in it at a given temperature, then determine their relation \((where, Y=\frac{C_{p}}{C_{v}})\)
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Question 27 of 45
27. Question
Angle of minimum deviation for a prism of refractive index 1.5, is equal to the angle of the prism is then the angle of the prism is [Given cos 41° = 0.75]
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Question 28 of 45
28. Question
With which of the following factor escape velocity of a particle of mass ‘m’ varies?
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Question 29 of 45
29. Question
Water enters through end A with speed \(V_{1}\) and leaves through end B with speed \(V_{2}\) of a cylindrical tube AB. The tube is always completely filled with water. In case I, tube is horizontal and in case II, it is vertical with end A upwards and in case III, it is vertical with end B upwards. Determine the case for which \(V_{1} = V_{2}.\)
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Question 30 of 45
30. Question
One mole of an ideal monoatomic gas is heated at a constant pressure of 1 atmosphere from 0°C to 100°C. Then find the change in the internal energy.
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Question 31 of 45
31. Question
Which of the following is the unit of specific heat?
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Question 32 of 45
32. Question
when heat energy of 1500 Joules is supplied to a gas at constant pressure \(2.1 \times 10^{5} N/m^{2}.\) there was an increase in its volume equal to \(2.5 \times 10^{3} m^{3}.\) Then how much increase is there in internal energy of the gas (in joules)?
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Question 33 of 45
33. Question
A room is maintained at 20°C by a heater of resistance 20 ohm connected to 200 volt mains. The temperature is uniform through out the room and heat is transmitted through a glass window of area \(1 m^{2}\) and thickness 0.2 cm. What will be the outside temperature? (Given: Thermal conductivity K for glass =0.2 cal/m/°C/s and J = 4.2 J/cal)
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Question 34 of 45
34. Question
A glass slab of thickness 3 cm and refractive index 3/2 is placed on ink mark on a piece of paper. For a person looking at the mark at a distance 5 cm above it, what distance of the mark will appear?
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Question 35 of 45
35. Question
Name the least doped region in a transistor.
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Question 36 of 45
36. Question
A 2 kg body and a 3 kg body are moving along the xaxis. At a particular instant the 2 kg body has a velocity of \(3 ms^{1}\) and the 3 kg body has the velocity of \(2 ms^{1}.\) Then calculate the velocity of the centre of mass at that instant.
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Question 37 of 45
37. Question
A particle at t = 0 second is at point A and moves along the shown path (ABCDE) with uniform speed \(v = (1 + \frac{\pi}{3})m / s.\)Both the straight segments AB and DE are along the diameter BD of semicircle BCD of radius R = 1 metre. Find the instant of time at which the instantaneous velocity of the particle is along the direction of average velocity from t = 0 second to that instant
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Question 38 of 45
38. Question
Statement 1: The whole mass of the atom is assumed in the nucleus.
Statement 2: The mass of a nucleus can be less or more than the sum of the masses of nucleons present in it.CorrectIncorrect 
Question 39 of 45
39. Question
Thin uniform rod of length ‘l’ and mass ‘m’ is swinging freely about a horizontal axis passing through its end. Its maximum angular speed is ’\(\omega’.\) Determine the height to which its centre of mass rises to maximum.
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Question 40 of 45
40. Question
A wave travelling along positive xaxis is given by \(y = A sin(\omega t – kx).\) If it is reflected from rigid boundary such that 80% amplitude is reflected, then what is the equation of reflected wave?
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Question 41 of 45
41. Question
A body of mass M hits normally a rigid wall with velocity v and bounces back with the same velocity. The impulse experienced by the body is
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Question 42 of 45
42. Question
In a circus stuntman rides a motorbike in a circular track of radius R in the vertical plane. Then what will be the minimum speed at highest point of track?
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Question 43 of 45
43. Question
An electric motor creates a tension of 4500 newton in a hoisting cable and reels it in at the rate of 2 m/s. Then calculate the power of electric motor.
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Question 44 of 45
44. Question
A liquid film is formed in a loop of area \(0.05 m^{2}\) How much increase is there in its potential energy? (T = 0.2 N/m)
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Question 45 of 45
45. Question
Extension of a wire by the application of load is 3 mm. Evaluate the extension in a wire of the same material and length but half the radius by the same load.
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