A 220-V DC machine has an armature resistance of 0.5 Ohm. If the full-load armature current is 20 A, then find the emf induced by the machine when it acts as (i) generator (ii) motor.
1
(i) 210 V and (ii) 230 V
2
(i) 230 V and (ii) 210 V
3
(i) 240 V and (ii) 200 V
4
(i) 220 V and (ii) 220 V