Effects on Electric current

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1) Electric motor is a device which converts

2 points

a) mechanical energy to electrical energy

(b) electrical energy to mechanical energy

(d) mechanical energy to light energy.

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2)The direction of induced current is given by

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(a) Fleming’s right hand rule

(b) Fleming’s left hand rule

(d) Left hand thumb rule.

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3) Which of the following is not attracted by a magnet?

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(a) steel

(b) cobalt

(d) nickel

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(4) Inside the solenoid the magnetic field is

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a) Different at different points

b) Same at all points

c) Non uniform

d) Straight

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5) Fleming’s left hand rule is used to find

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a) Current

b) Magnetic field

c) Magnetic force

d) Volt

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6) When circuit is open ____ cannot pass through it.

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a) Voltage

b) Resistance

c) Current

d) Potential difference

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(7) The SI unit of magnetic induction is

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a) Newton

b) Joule

c) Tesla

d) Kilowatt

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(8) The device which produces electric current is called as

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a) Electric motor

b) Electric generator

c) Ammeter

d) Voltmeter

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(9) Electric generator works on the principle of

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a) Magnetism

b) Electromagnetic induction

c) Right hand thumb rule

d) Fleming’s left hand rule

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(10) The frequency of alternating current (AC) is

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(a) 0 Hz

(b) 50 Hz

(d) 100 Hz

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