Electricity and Magnetism MCQ question and answer with solution

1

Which of the following is a unit of magnetic flux?

A) Tesla B) Coulomb C) Weber D) Ampere-turn

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Answer & Solution

Answer: Option C

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2

Transformer is used for

A) Converting AC into DC B) Converting DC into AC C) To step up DC voltages D) To step up or step down AC voltages

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Answer & Solution

Answer: Option D

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3

Electric charge (Q) / time (t) = . . . . . . . .

A) Electric current (I) B) Potential difference (PD) C) resistivity D) resistance (R)

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Answer & Solution

Answer: Option A

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4

Find the resistance (in mega O) of a wire of length 10 m, cross sectional area 1 cm² and made of a material of resistivity 100 Ohm.

A) 1000 B) 20 C) 500 D) 10

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Answer & Solution

Answer: Option D

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5

Fuse wire used for safety of household have

A) Low melting point B) High melting point C) High resistance D) Both A and C

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Answer & Solution

Answer: Option D

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6

What is the order of magnitude of electric resistance of the human body (dry)?

A) 10² ohm B) 10⁴ ohm C) 10⁶ ohm D) 10⁸ ohm

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Answer & Solution

Answer: Option C

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7

Which one of the following device is non-Ohmic?

A) Conducting copper coil B) Electric heating coil C) Semi-conductor diode D) Rheostat

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Answer & Solution

Answer: Option C

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8

Which one of the following is a good electrical conductor?

A) Graphite B) Diamond C) Peat D) Charcoal

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Answer & Solution

Answer: Option A

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9

Which of the following statements regarding magnetic field is not correct?

A) Magnetic field is a quantity that has direction and magnitude B) magnetic field lines are closed curves C) Magnetic field lines are open curves D) No two magnetic field lines are found to cross each other

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Answer & Solution

Answer: Option C

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10

Statement I A compass needle placed near a current-carrying wire will get deflected.
Statement II A current-carrying wire creates magnetic field around it.

A) Statement I and statement II are correct and statement II is the correct explanation of statement I B) Statement I and statement II are correct, but statement II is not the correct explanation of statement I C) Statement I is correct, but statement II is incorrect D) Statement I is incorrect, but statement II is correct

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Answer & Solution

Answer: Option A

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