Electricity and Magnetism MCQ question and answer with solution

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Each section contains 100 MCQs on Electricity and Magnetism .

What does the rating of electricity displayed on the electric bulb mean 100 watts?

A) The bulb consumes 100 joules of electrical energy per hour B) The bulb consumes 100 joules of electrical energy per second C) The bulb consumes 100 joules of electrical energy per minute D) The bulb consumes 100 kg of electrical energy per hour

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

If a bulb of 100 watt burns for 10 hours, the expenditure of electricity will be

A) 0 - 1 unit B) 1 unit C) 10 units D) 100 units

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Magnetic meridian is an imaginary

A) line along North-South B) point C) vertical plane D) horizontal plane

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Which of the following device protect electrical devices from voltage spikes?

A) voltage load B) surge protector C) heat protector D) current protector

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

In comparison to an electric bulb, a fluorescent tube is preferred because

A) It has greater external outer surface to radiate/emit the light B) There is no effect of voltage fluctuation on it C) In the tube, electric energy almost converted into light energy D) None of the above

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

In a house, 150 units of energy is used during a month. What will be the amount of this energy in joules?

A) 9 × 10⁸ J B) 5.4 × 10⁸ J C) 5 × 10⁸ J D) 10 × 10⁸⁵ J

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Alternating current can not be measured by DC ammeter because

A) AC cannot pass through DC ammeter B) average value of complete cycle is zero C) AC is virtual D) AC changes its direction

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

Ohm's law is valid in case of

A) superconductor B) insulator C) semiconductor D) conductor

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

The formula for electric current is I = . . . . . . . . /time (t).

A) charge B) power C) resistance D) volt

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

If the speed of a moving magnet inside a coil increases, the electric current in the coil

A) increases B) decreases C) reverses D) remains the same

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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Electricity and Magnetism MCQ question and answer with solution | Physics Gk MCQs