q)The type of power amplifier which exhibits crossover distortion in its output is
(gate 2000)
(a) Class A
(b) Class B
(c) Class AB
(d) Class C
The power input to a 415V, 50 Hz, 6 pole, 3-phase induction motor running at
975 rpm is 40 kW. The stator losses are 1kW and friction and windage losses total 2 kW. Theefficiency of the motor is(gate 2000)
(a) 92.5
(b) 90
(c) 91

q)The pressure coil of a dynamometer type wattmeter is (gate 2009)
(A) highly inductive (B) highly resistive
(C) purely resistive (D) purely inductive

q) The trace and determinant of a 2×2 matrix are known to be -2 and -35
respectively. Its eigen values are( gate 2009)

(A) -30 and -5 (B) -37 and -1

(C) -7 and 5

(D) 17.5 and -2


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