Physics Test Bank
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Physics Test Bank
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25 Questions

1. Which one of the following statements regarding artificial satellite of the earth is incorrect?
2. The fundamental frequency of a stretched string is v0. If the length is reduced by 35% and tension increased by 69%, the fundamental frequency will be
3. A ball thrown upward with a velocity of 100 ms'1. It will reach the ground after
4. The bond between carbon atoms in diamond is
5. A sprayer works on the principle expounded by
6. A block of mass m is pulled along a surface as shown. The coefficient of kinetic friction between the block and the surface is m and the tension in the rope is T. The acceleration of the block is
7. Boyle's law is applicable in
8. Which of the following illustrations is not based on the principle of pressure?
9. Who among the following gave first the experimental value of G?
10. A wire is made by welding two wires (radii r and 2r) at one of its ends. This combined wire is used in the sonometer, under tension T with the welding point just in middle of the bridges. On vibrating, stationary waves are produced. If welding point is a node, then the ratio of loops formed in both the parts will be
11. If the earth is assumed to be a homogeneous sphere and if, somehow, it contracts to half its present size, the duration of the day will be
12. The three primary colours are
13. A tennis ball will bounce
14. The diagram below shows the propagations of a wave. Which points are in phase ?
15. Thermoelectric current produced is large when
16. As seen from the earth, which planet appears the brightest at night?
17. An open pipe of length l is vibrating in its fundamental mode. The pressure change is maximum inside the pipe at
18. In diesel engines, ignition takes place by
19. To obtain a p-type germanium semiconductor, it must be doped with
20. A small spherical ball of lead is dropped through a highly viscous liquid. It will have
21. The specific resistance of manganin is 50 × 10' 6 Wm. The resistance of a cube of manganin having length 50 cm will be
22. In a building, there are 15 bulbs of 40W, 5 bulbs of 100W, 5 fans of 80 Watts and 9 heaters of 1kW. The voltage of the electric mains is 220V. The minimum capacity of the main fuse of the building will be
23. 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
24. The earth's magnetic induction at a certain point is 7 × 10' 5 Wbm'2. This is to be annulled by the magnetic induction at the centre of a circular conducting loop of radius 5 cm. The required current in the loop is
25. A person measures the time period of simple pendulum inside a stationary lift and finds it to be T. If the lift starts accelerating upwards with an acceleration g/2, the time period of pendulum will be

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