21. When the main switch of the house is put OFF, it disconnects the
22. A photostate machine works on
23. The flow of . . . . . . . . is anti-clockwise in the given circuit.
24. The instrument used for detecting the presence of electric current in a circuit is
25. The energy used in industries and commercial establishments is usually represented in the form of . . . . . . . .?
26. The potential difference is 12 V and the work done is 60J. Find the electric charge flowing through the circuit:
27. How much work is done in moving a charge of 5Q across two points having a Potential difference of 10V?
28. How does the white light produce in the tube?
29. If the amount of work is done in moving the charge of 3 coulombs across two points is 72 J. Then what would be the potential difference across these points?
30. What is the process of transferring of charge from a charged object to the Earth called?
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