Electricity and Magnetism MCQ question and answer with solution

1

A mobile phone charger is

A) an inverter B) a ups C) a step up transformer D) a step down transformer

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Answer & Solution

Answer: Option D

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2

What will be the total resistance of the three 20-Ω coils connected in series?

A) 40 Ω B) 20 Ω C) 60 Ω D) 800 Ω

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Answer & Solution

Answer: Option C

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3

AC and DC are the form of?

A) charge flow B) voltage flow C) water flow D) air flow

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Answer & Solution

Answer: Option A

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4

Superconductors are substances which

A) conduct electricity at lower temperature B) offer high resistance to the flow of current C) offer not resistance to the flow of current D) conduct electricity at high temperature

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Answer & Solution

Answer: Option C

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5

The best material for the core of a transformer is

A) stainless steel B) mild steel C) hard steel D) soft iron

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Answer & Solution

Answer: Option D

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6

The lamps fitted to illuminate the roads/streets:

A) In series B) In parallel C) Labyrinth in parallel D) Head to head

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Answer & Solution

Answer: Option B

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7

What is the resistance (in Ω) of an electrical component, if a current of 0.1A passes through it on application of 5V of potential difference across it?

A) 0.5 B) 100 C) 50 D) 1

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Answer & Solution

Answer: Option C

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8

Which of following property of a proton cannot change while it moves freely in magnetic field?

A) Speed B) Velocity C) Momentum D) Both speed and velocity

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Answer & Solution

Answer: Option A

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9

Ohm's law states the relation between . . . . . . . . and . . . . . . . .

A) potential difference, electric charge B) electric current, electric charge C) electric charge, time D) potential difference, electric current

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Answer & Solution

Answer: Option D

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10

Which instrument is used to measure electric current?

A) potentiometer B) galvanometer C) ammeter D) voltmeter

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Answer & Solution

Answer: Option C

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