A) 2 B) 4 C) 6 D) 12 Ans : (A)
A) increasing armature resistance B) cooling the armature C) reducing load voltage D) increasing input to the prime mover. Ans : (D)
A) remain constant B) decreases sharply C) decreases slightly D) increases slightly. Ans : (C)
A) many turns of thin wire B) many turns of thick wire C) few turns of thin wire D) few turns of thick wire. Ans : (D)
A) P B) 2P C) (2P + 2) D) P/2. Ans : (A)
A) many turns of thin wire B) many turns of thick wire C) few turns of thin wire D) few turns of thick wire. Ans : (A)
A) mutually induced emf B) dynamically induced emf C) self induced emf D) all of them. Ans : (B)
A) brushes B) commutator C) equalizer ring D) dummy coils. Ans : (B)
A) 60 Hz B) 50 Hz C) 25 Hz D) 100 Hz. Ans : (B)
A) 0.02 wb B) 0.06 wb C) 0.04 wb D) 0.08 wb. Ans : (D)