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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. How many units of electricity will be consumed if you use a 60 watt electric bulb for 5 hours everyday for 30 days?
2. Alternating current is converted to direct current
3. If potential difference and current flowing through a wire is increased twice each, then electric power
4. Of the two bulbs in a house, one glows brighter than the other. In this context which of the following statements is correct?
5. Turbines and Dyanamos are used to convert which energy to electrical energy?
6. Which gas is filled in normal tubelights?
7. In a three-pin electrical plug longest pin should be connected to
8. An electric bulb of 100 watt is used for 4 hours. The unit of electric energy used is
9. How does the white light produce in the tube?
10. The value of 1 kilowatt hour is
11. Which of the following option represents the consumption of power in ascending order?
12. What is the order of magnitude of electric resistance of the human body (dry)?
13. A wire with black insulation during electric supply is
14. Consider the following statements. An ordinary light bulb has a rather short life because the
1. Filament wire is not uniform.
2. Bulb cannot be evacuated completely.
3. Wires supporting the filament melt at high temperatures. Which of the above statements are correct?
15. Transformer is used for
16. A fuse wire is characterized by
17. Fuse wire used for safety of household have
18. Consider the following statements regarding a motor car battery.
1. The voltage is usually 12V.
2. Electrolyte used is hydrochloric acid.
3. Electrodes are lead and copper.
4. Capacity is expressed in ampere-hour. Which of the above statements are correct?
19. A dynamo which is said to generate electricity actually acts as a
20. The Earth's magnetic field is due to
21. 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
22. 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
23. 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?
24. Assertion (A): The temperature of a metal wire rises when an electric current is passed through it. Reason (R): Collision of metal atoms with each other releases heat energy. Code
25. Principle of fuse is

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