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General Physics Previously Asked Questions: Electric Current
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General Physics Previously Asked Questions: Electric Current
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25 Questions

1. Fluorescent tubes are fitted with a choke. The choke coil
2. Full form of C.F.L. is
3. A fuse wire is characterized by
4. Which of the following metals is used as filament in lighting bulbs?
5. An electric bulb of 100 watt is used for 4 hours. The unit of electric energy used is
6. The device used for converting alternating current to direct current is called
7. What is the difference between a CFL and an LED Lamp?
1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semiconductor material.
2. The average life span of a CFL is much longer than of an LED lamp.
3. A CFL is less energy efficient as compared to an LED lamp. Which of the statements given above is/are correct?
8. If a bulb of 100 watt burns for 10 hours, the expenditure of electricity will be
9. When electrical energy is converted into motion
10. Consider the following statements. Assertion (A): Lightning conductors prevent buildings from damages in the event of lightning strike. Reason (R): The electric charge conduct to ground through the wire, instead of passing through the structure. Select the correct answer using the codes given below. Code
11. Small drops of the same size are charged to V volts each. If n such drops coalesce to form a single large drop, its potential will be
12. What is the order of magnitude of electric resistance of the human body (dry)?
13. Which of the following option represents the consumption of power in ascending order?
14. The filament of a halogen lamp is an alloy of
15. In a three-pin electrical plug longest pin should be connected to
16. Transformer is used for
17. The Earth's magnetic field is due to
18. Electric motors operating at low voltages tend to burn out because
19. Which gas is filled in normal tubelights?
20. Principle of fuse is
21. A 100 watt electric bulb is used for 10 hours. What will be the cost of electricity consumed, if the consumption cost is Rs. 5 per unit?
22. A dynamo which is said to generate electricity actually acts as a
23. The temperature of the filament of lighted electric bulb is generally
24. A wire with black insulation during electric supply is
25. Assertion (A): Light Emitting Diode (LED) lamps offer longer service life as compared to Compact Fluorescent Lamps (CFL). Reason (R): Light Emitting Diodes (LED) lamps are more energy efficient as compared to the Compact Fluorescent Lamps (CFL). Select the correct answer using the codes given below. Code

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