- (A) silicon steel
- (B) cast iron
- (C) aluminium
- (D) bronze
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- (A) Lenz’s law
- (B) Ohm’s law
- (C) Faraday’s law of electromagnetic induction
- (D) none of the above
- (A) only if the load current is zero
- (B) only if the load current is not zero
- (C) irrespective of the value of load current
- (D) none of the above
- (A) will be less than 250 V
- (B) will always be 250 V
- (C) may be greater or less than 250 V
- (D) none of the above
- (A) 150 V
- (B) less than 150 V
- (C) greater than 150 V
- (D) none of the above
- (A) only if the resistance of the field circuit is less than critical value
- (B) only if the resistance of the field circuit is greater than critical value
- (C) irrespective of the value of the resistance in the field circuit
- (D) none
- (A) 100% regulation
- (B) infinite regulation
- (C) 50% regulation
- (D) 1% regulation
- (A) 270 V
- (B) 267.5 V
- (C) 265 V
- (D) 257.4 V
- (A) reduce windage losses
- (B) reduce eddy currents
- (C) reduce accumulation of dirt and dust
- (D) reduce magnetic hum
- (A) 0.04%
- (B) 0.4%
- (C) 4%
- (D) 14%
