Physics Test Bank
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Physics Test Bank
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25 Questions

1. A medium is dispersive if
2. A supersonic plane flies at the speed
3. What do we call a substance that is repelled by a magnet?
4. The frequency of an open organ pipe is f. If half of the organ pipe is dipped in water, then frequency is
5. 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
6. If S is stress y is Young's modulus of material of a wire, the energy stored in the wire per unit volume is
7. A particle carrying charge 100 times the charge of an electron, is revolving at 1 revs'1 in a circular path of radius 0.8 m. The magnetic field developed at the centre will be
8. The angle of minimum deviation of an equiangular prism, having a refractive index of 1.732 is
9. The Leaning Tower of Pisa does not fall because
10. There is a ditch 13.7 ft wide between the approach roads at an angle of 18.5° with the horizontal as shown in figure. What should be the minimum speed of motorcyclist (length of motor cycle 5.5 ft) so that he safely crosses the ditch?
11. The mirage is seen in a hot desert because of
12. A capacitor (condenser) is used in an electrical circuit in order to
13. An ideal Carnot engine whose efficiency is 40% receives heat at 500 K. If the efficiency is to be 50%, the intake temperature for the same exhaust temperature is
14. Sound waves in air are
15. A capillary tube is kept vertical in a beaker containing liquid. The height to which the liquid rises by capillary action is increased if
16. While passing over a suspension bridge, soldiers are not allowed to march in steps. This is
17. A beaker full of hot water is kept in a room and it cools from 80°C to 75°C in t1 minutes, from 75°C to 70°C in t2 minutes and from 70°C to 65°C in t3 minutes. Then
18. If a pendulum clock be taken from the earth to a revolving artificial satellite, it will
19. Which of the following statement is incorrect?
20. Transformers are used in
21. Conservation of energy means that
22. A nucleus ruptures into two nuclear parts which have their velocity ratio equal to 2:1. What will be the ratio of their nuclear size (nuclear radius)?
23. The nucleus of an atom consists of
24. A person climbing a hill bends forward in order to
25. A mass M is supported by a light string which is wound around a uniform cylinder of equal mass M and radius R. If the system is released from rest, the acceleration of the mass M is

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