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Electric Motor

State whether...

Question

State whether True or False :
A 220V DC machine has an armature resistance 1 ohm. If the full load current is 20A, difference of induced voltage and generator is 30 V.

A

True

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B

False

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Solution

The correct option is B False
Induced EMF in case of DC Generator is $E = V + I_{a} R_{a}$
Hence, $E = 220 + 20 \times 1$
Therefore $E - V = 20 V$ Hence statement is False

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