MCQ on Electronic Circuits

Rajasthan Polytechnic Third Year Paper 2016 – Electronic Circuits

Maximum number of terminals in a single gate MOSFET can be
(a) 3
(b) 4
(c) 5
(d) None of these

An open circuit is shown between gate and source in a MOSFET because
(a) Gate is reverse biased
(b) Gate is forward biased
(c) No conducting channel between gate and source
(d) None of these

10, 15 and 20 are respectively power gain in a coupled amplifier circuit. What is total power gain?
(a) 45
(b) 3000
(c) 34.70 dB
(d) Both (b) and (c) are correct

The main compoenent responsible for the fall of gain in the low frequency range in a R-C coupled multistage amplifier is
(a) Coupling capacitor
(b) Collector resistance
(c) Biasing system
(d) Emitter resistance

Rise time of output signal is increasing in the frequency response of an amplifier during square wave teting. It means
(a) High frequency response of amplifier is not proper
(b) Low frequency response of amplifier is not proper
(c) Mid frequency response is not proper
(d) Complete frequency response of an amplifier is not proper

coupled amplifier suitable for impedance matching is
(a) Direct coupled
(b) R-C coupled
(c) L-C copuled
(d) Transofrmer coupled

The maximum collector efficiency of class-A power amplifier is
(a) 25%
(b) 50%
(c) 78.5%
(d) None of these

Distortion introduced in output signal due to biasing of operating point at cut-off in a power amplifier is known as
(a) Harmonic distortion
(b) Frequency distortion
(c) Cross-over distortion
(d) Phase distortion

The feedback in emitter follower amplifier is
(a) 50%
(b) 100%
(c) 0%
(d) 25%

Negative feedback in amplifiers
(a) lowers its lower cut-off frequency
(b) raises its upper cut-off frequency
(c) increases the bandwidth
(d) All the above