21. Which one of the following statements about bar magnet is correct?
22. 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:
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:
23. If the value of V/I is a constant, then what is it called?
24. The SI unit of electric field is
25. When a current of 0.5A flows through a filament of the electric bulb. Then amount of electric charge flows through a circuit is 300C, Calculate the time.
26. The temperature of the filament of lighted electric bulb is generally
27. When many resistance in a circuit are connected in series, the value of current in each resistance is:
28. If there is an increase in current in a circuit with 5 ohms resistance, the voltage-
29. In a circuit diagram,
The given symbol is used as follows:
30. The value of 1 kilowatt hour is
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