Choose the correct alternative and rewrite statement. Chapter No. 4: Effects of Electric Current.

Choose the correct alternative and rewrite statement.
Chapter No. 4: Effects of Electric Current.

If 220V potential difference is applied across an electric bulb, a current of 0.5 A flows in the bulb. What must be the power of the bulb?

A. 99W
B. 110W
C. 150W
D. 220W

Two bulbs are connected in series in a circuit. If the filament of a bulb breaks then, __________

A. second bulb will glow brighter.
B. second bulb will not glow.
C. there will be overloading in the circuit.
D. resistance of the circuit will decrease.

To detect magnetic field produced by current carrying conductor _______ is used.

A. voltmeter
B. magnetic needle
C. electromagnet
D. galvanometer.

Magnetic field produced by a current carrying circular loop can be doubled by

A. doubling the number of turns in the loop.
B. changing shape of the loop to square.
C. halving the number of turns in the loop.
D. using alternating current.

Answers:

Chapter No. 4: Effects of Electric Current.

If 220V potential difference is applied across an electric bulb, a current of 0.5 A flows in the bulb. What must be the power of the bulb?

A. 99W
B. 110W
C. 150W
D. 220W

Two bulbs are connected in series in a circuit. If the filament of a bulb breaks then, __________

A. second bulb will glow brighter.
B. second bulb will not glow.
C. there will be overloading in the circuit.
D. resistance of the circuit will decrease.

To detect magnetic field produced by current carrying conductor _______ is used.

A. voltmeter
B. magnetic needle
C. electromagnet
D. galvanometer.

Magnetic field produced by a current carrying circular loop can be doubled by

A. doubling the number of turns in the loop.
B. changing shape of the loop to square.
C. halving the number of turns in the loop.
D. using alternating current.

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