Saturday, 2 May 2020



If the effect of ground is taken into account, then the capacitance of line to ground:
(A) decreases
(B) Increases
(C) remain unchanged
(D) becomes infinite
Answer - - A

The DC shunt motor. operating under unsaturated region develops the maximum mechanical power when the armature current is such that the motor back emf (E) and the applied voltage (V) to the motor terminal are related as:
(A) E=V
(B) E=V/2
(C) E= V/3
(D) E=V/4
Answer - -B

The unit of flux density is:
(A) Tesla
(B) A/mm
(C) N/m2
(D) Wb/m
Answer - - A

If a DC voltmeter is made from an ammeter having a full scale deflection of 100 uA, then its sensitivity (in KΩ /V) will be:
(A) 1
(B) 10
(C) 100
(D) 1000
Answer - - B

The impedance of a high Q inductor can be measured using:
(A) Schering bridge
(B) Wien Bridge
(C) Maxwell bridge 
(D) Hay bridge
Answer - - D

The time taken for a range to travel a 600 km long overhead transmission line is: 
(A) 6s
(B) 1s
(C) 0.02 s
(D) 0.002 s
Answer - - D

A star/delta starter of a 3 phase induction motor is equivalent to an autotransformer starter having a tapping of:
(A) √3/2
(B) 1/2
(C) 1/√3
(D) √3
Answer - - C

The amplifier has a voltage gain of 100. To induce distortion, 10% negative is employed. The gain of the amplifier with feedback is: 
(A) 1.01
(B) 9.09
(C) 90.9
(D) 101
Answer - -  C


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