1. Capacity of a parallel plate condenser can be doubled by
I. doubling the areas of the plates. II doubling the distance of separation between the plates. III. reducing the distance of separation between the plates to half the original separation. IV. doubling both the areas of the plates and the distance of separation between the plates. Select the correct answer using the code given below

2. When an electrical safety fuse is rated (marked) as 16 A, it means it

3. A current of 0.5A is drawn by a filament of an electric bulb for 20 minutes. The amount of electric charge that flows through the circuit is

4. DC current can be controlled by which one of the following components?

5. Which one of the following is correct? Lightning is formed, when

6. The effective resistance of two wires is 2 x. The resistance of one wire is two times that of the other wire and is three times the effective resistance. Which one of the following is correct in respect of value of x ?

7. How many sixty watt (60 W) bulbs may be safely used in a 240-V supply with 4-ampere fuse?

8. A hollow sphere of radius 50 cm is charged, such that the potential on its surface is 500 V. What is the potential at the centre of sphere?

9. The polarity of an unmarked horse shoe magnet can be determined by using

10. Consider the following circuit

The current flowing through each of the resistors connected in the above circuit is

11. A house, served by a 220 V supply line, is protected by a 9A fuse. What is the maximum number of 60 watt bulbs that can be turned on in parallel ?

12. Which one among the following is the correct order of power consumption for light of equal intensity ?

13.
If an input current 3 A flows through the circuit shown above, what is the value of the current flowing through the 4W resistor?

14. A circular coil of single turn has a resistance of 20 W. Which one of the following is the correct value for the resistance between the ends of any diameter of the coil?

15. The wavelength of X-rays is of the order of

16. Which one of the following is the correct statement? For an open circuit, the value of load,

17. The phenomenon of electromagnetic induction implies a production of induced

18. A bar magnet is placed inside a uniform magnetic field. What does it experience?

19. A hollow metal ball carrying an electric charge produces no electric field at points

20. The rating of an electric lamp is 110V. To use it on 220 V, one will have to use which one of the following?

21. Which one of the following physical quantities does NOT affect the resistance of a cylindrical resistor?

22. Which one of the following does not affect the motion of a moving electron?

23. Why does one experience a strong shock when one accidentally touches a live wire of, say, 220 V ?

24. Kilowatt- hour is the unit of

25. Match List I with List II and select the correct answer using the code given below the Lists :List I List II (Magnet) (Property)
A. Artificial magnet 1. Long lived
B. Permanent magnet 2. Last for infinitely long period
C. Temporary 3. Short lived magnet
D. Earth as a magnet 4. Induced magnet Code : A B C D