Physics Test Bank
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Physics Test Bank
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25 Questions

1. Which of the following statement is incorrect?
2. The atmosphere exerts enormous pressure on us. But we do not feel it because
3. The half life of a radioactive substance depends upon
4. Two stretched strings produce beats of frequency 10 Hz, the tension of string A is slightly increased and beat frequency becomes 5 Hz. If the frequency of the other string is 500 Hz, what is the original frequency of the string A?
5. In diesel engines, ignition takes place by
6. Two filaments of same length are connected first in series and then in parallel. For the same amount of main current flowing, the ratio of the heat produced is
7. In which case, application of angular velocity is useful?
8. A body dropped from a height h with an initial speed zero, strikes the ground with a velocity 3 kmh1. Another body of same mass is dropped from the same height ‘h' with an initial speed u' = 4 kmh'1. Find the final velocity of second body, with which it strikes the ground.
9. A circular loop of wire is rotated at constant angular speed about an axis that makes an angle q with a constant magnetic field as shown in figure. The e.m.f. induced in the coil will be zero at all times if
10. At 0 K which of the following properties of a gas will be zero?
11. Which of the following is different from others?
12. The waves moving from a sitar to a listener in air are
13. The displacement of an object is given by y = 0.02sin(20pt). The period of the system is
14. Hot coffee is poured simultaneously in four metallic tumblers painted outside with different types of paints. After sometime, the coffee will be found coldest in the tumbler painted
15. A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that
16. There is horizontal film of soap solution. On it a thread is placed in the form of a loop. The film is pierced inside the loop and the thread becomes a circular loop of radius R. If the surface tension of the loop be T, then what will be the tension in the thread?
17. Sound travelling at 340 ms'1 enters water where the speed of sound becomes 1480 ms'1. Critical angle for total reflection is
18. The equation of a transverse wave travelling on a rope is given by y = 10 sinπ (0.01x ' 2.00t) where y and x are in centimetres and t in second's. The maximum transverse speed of a particle in the rope is about
19. When a solid metallic sphere is heated, the largest percentage increase occurs in its
20. A simple harmonic progressive wave is represented by the equation y = 8 sin 2p(0.1x ' 2t) where x and y are in centimetres and t is in seconds. At any instant, the phase difference between two particles separated by 2.0 cm in the x-direction is
21. Two sound waves of slightly different frequencies propagating in the same direction produce beats due to
22. The insulating properties of substances like mineral wool, woollen blankets, U-foam, etc. are because
23. Two simple harmonic motions in the x ' y plane are described by x = Acoswt A y = cos(wt +f). The superposition of these two motions is a straight line. The value of would then be
24. When a current flowing through a resistance increases four times, the heat developed will increase
25. Maximum density of H2O is at the temperature

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