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Field Due to a Solenoid

The armature ...

Question

The armature current in a dc motor is maximum when the motor has

A

picked up maximum speed

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B

just started

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C

intermediate speed

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D

just been switched off

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Solution

The correct option is B
just started

$I = \frac{E - e}{R}$

is maximum if back emf is minimum when motor has just started.

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Field Due to a Solenoid

Standard XII Physics

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