A) the same as the rated speed of the motor having lowest rpm B) one fourth of the speed of the motors when connected in parallel C) half the speed of motors when connected in parallel D) the same as the speed of motors when connected in parallel. Ans : (B)
A) their rating and armature sizes are identical B) their speeds are equal and back emfs are half the supply voltage C) their speeds and excitations are identical D) their speeds are identical. Ans : (C)
A) burn out B) not start C) run with excessive noise D) run at very high rpm. Ans : (D)
A) both have same excitation B) both have same speed C) both have same back emf D) both operate at same voltage. Ans : (B)
A) 0.1 ohm B) 1 ohm C) 200 ohms D) 20000 ohms. Ans : (C)
A) 2 V B) 20 V C) 50 V D) 100 V. Ans : (A)
A) 400 rpm B) more than 400 rpm C) 380 rpm D) less than 400 rpm. Ans : (B)
A) Armature voltage variation B) Armature resistance control C) Varying the field current D) All of the above. Ans : (C)
A) A series generator B) A shunt generator C) A cumulatively compounded generator D) A differentially compounded generator. Ans : (D)
A) duplex wave winding on a single rotor B) combined lap and wave winding on a single rotor C) same as duplex winding D) same as simplex winding. Ans : (B)