Problem

The armature of a DC motor has

20 \Omega

resistance. It draws a current of

1.5 \text{ A}

when run by

200 \text{ V}

DC supply. The value of back emf induced in it will be (a)

150 \text{ V}

(b)

170 \text{ V}

(c)

180 \text{ V}

(d)

190 \text{ V}