Explanation: Any of the above mentioned methods will produce EMF in the armature windings. 2. The EMF equation e = NωrΦsinωrt is applicable to ____________
A. AC systems with time variant field flux
B. DC systems with time variant field flux
C. both AC and DC systems with time invariant field flux
D. both AC and DC systems with time variant field flux
Answer:A
Explanation: Any of the above mentioned methods will produce EMF in the armature windings. 2. The EMF equation e = NωrΦsinωrt is applicable to ____________
A. AC systems with time variant field flux B. DC systems with time variant field flux C. both AC and DC systems with time invariant field flux D. both AC and DC systems with time variant field flux
Explanation: e = NωrΦsinωrt-NdΦ/dtcosωrt, for time invariant field flux dΦ/dt = 0 ⇒ e = NωrΦsinωrt, is the general equation, and is applicable to both AC and DC systems.