Explanation: Larger pole shoe area increases the flux per pole entering the armature, due to the reduction in air gap reluctance, and it also provides mechanical strength. 9. In a DC generator, the commutator serves as a _________
A. mechanical rectifier for alternating EMF to direct EMF
B. mechanical inverter to invert the direct applied voltage to alternating voltage
C. any of the mentioned
D. none of the mentioned
Answer:A
Explanation: Larger pole shoe area increases the flux per pole entering the armature, due to the reduction in air gap reluctance, and it also provides mechanical strength. 9. In a DC generator, the commutator serves as a _________
A. mechanical rectifier for alternating EMF to direct EMF B. mechanical inverter to invert the direct applied voltage to alternating voltage C. any of the mentioned D. none of the mentioned
Explanation: A DC generator is equivalent to an AC machine plus a mechanical rectifier, i.e, commutator. 10. In a DC motor, the commutator serves as a ___________