1. When an alternating voltage is applied to a capacitor

2. A beam of light passes from a glass of refractive index 1.5 into water of refractive index 1.3. How do speed and wavelength of the light alter? Speed Wavelength

3. A copper ring is held horizontally and a bar magnet is dropped through the ring along axial line. The acceleration of the magnet while it is passing through the ring

4. A wave is represented by the equation y = 7 sin[p(2x ' 2t)] where x is in metres and t in seconds. The speed of the wave is

5. In our homes, electricity is supplied at 220 V AC. The value 220 represents

6. Bats can fly in the dark because

7. The bimetallic strip in a thermostat consists of brass and iron. When the strip is heated, it bends into an arc with brass on the convex side and iron on the concave side of the arc. This happens because

8. A 0.5 kg block slides from the point A on a horizontal track with an initial speed 3 ms'1 towards a weightless horizontal spring of length 1m and force constant 2N/m. The part AB of the track is frictionless and part BC has the coefficient of static and kinetic friction 0.22 and 0.20, respectively. If the distance AB and BD are 2m and 2.14m, respectively find the total distance through which the block moves before it comes to rest.[g = 10 ms'2]

9. 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.

10. Write the dimensions of emissivity.

11. In the case of motors and lorries moving along a bend, the centripetal force is provided by

12. If two vectors A → and B → are collinear to each other, it follows that

13. The fundamental frequency of a closed pipe is 220 Hz. If three-fourth of the pipe is filled with water, the frequency of the first overtone of the pipe now is

14. Which one of the following equations represents a wave?

15. The velocity of sound in gas is dependent of

16. A cylinder of 500 g and radius 10 cm has moment of inertia (about its natural axis)

17. One thousand microns is equal to

18. While running over a horizontal level rod, the man holds the umbrella in the vertical direction. If he stops, then in order to protect himself from the rain, he should hold it

19. When Ge crystals are doped with phosphorus atom, then it becomes

20. A fly wheel is in the form of solid circular wheel of mass 72 kg and radius of 5 m and it takes 70 rpm then the energy of revolution is

21. Energy of 1g uranium is equal to

22. Sound travels fastest through

23. The dimension of electrostatic potential is

24. Lenz's law is a consequence of conservation of

25. The work done in carrying a positive charge from one point to another on an equipotent surface is