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The armature of a dc motor has 20 Omega ...

The armature of a dc motor has `20 Omega` resistance It draws a currrent of `1.5` A when run by a `220 V` dc supply The value of the block emf induced in it is .

A

`150V`

B

`170V`

C

`180V`

D

`190V`

Text Solution

Verified by Experts

The correct Answer is:
D
`(E-e)/(R) implies 1.5 = (220-e)/(20) implies e =190V` .
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