DMRC Electrical Engineering Paper-1 2014
For the following questions answer them individually
DMRC Electrical Engineering Paper-1 2014 - Question 71
A 3-phase synchronous motor, connected to infinite bus, is operating at no load at normal excitation. The field excitation of the motor is first decreased to zero and
then increased in the reverse direction. The armature current of the synchronous motor will:
DMRC Electrical Engineering Paper-1 2014 - Question 72
If a resistance is inserted in the rotor circuit of a slip ring induction motor, then compared to direct line starting:
DMRC Electrical Engineering Paper-1 2014 - Question 73
Starting torque can be obtained in the case of a single phase induction motor with identical main and auxiliary windings by connecting:
DMRC Electrical Engineering Paper-1 2014 - Question 74
Armature shunting method of speed control of dc shunt motor is preferred over armature resistance method due to:
DMRC Electrical Engineering Paper-1 2014 - Question 75
Distribution transformers have core losses;
DMRC Electrical Engineering Paper-1 2014 - Question 76
Hollow conductors are used in the transmission lines to:
DMRC Electrical Engineering Paper-1 2014 - Question 77
In a junction transistor, the doping level of collector region is:
DMRC Electrical Engineering Paper-1 2014 - Question 78
The equivalent resistance of the circuit is:
DMRC Electrical Engineering Paper-1 2014 - Question 79
The purpose of a coupling capacitor in an amplifier is to :
DMRC Electrical Engineering Paper-1 2014 - Question 80
A circuit requires a capacitor of $$100 \mu f$$, 25V. The capacitor can be:
