Explore topic-wise MCQs in Analog Circuits.

This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Circuits knowledge and support exam preparation. Choose a topic below to get started.

1.

Given that the charging current of capacitor is constant in a monostable multivibrator using IC 555, then find the type of output waveform, type of capacitor voltage waveform and the time period of output.

A. The capacitor waveform is a ramp, the output waveform is sinusoidal, the time period is ( frac{2.C.VCC}{3.I} )
B. The capacitor waveform is a ramp, the output waveform is a pulse, the time period is ( frac{2.C.VCC}{3.I} )
C. The capacitor waveform is a ramp, the output waveform is a pulse, the time period is ( frac{C.VCC}{3.I} )
D. The capacitor waveform is a ramp, the output waveform is a ramp, the time period is ( frac{2.C.VCC}{3.I} )
Answer» C. The capacitor waveform is a ramp, the output waveform is a pulse, the time period is ( frac{C.VCC}{3.I} )
Discussion
2.

How can a monostable multivibrator using IC 555 be used as a PWM generator?

A. If a diode is connected across the resistor RA
B. If a modulating signal m(t) is applied at the control pin
C. If the control pin is always kept high
D. It cannot be used as a PWM generator ever
Answer» D. It cannot be used as a PWM generator ever
Discussion
3.

In the astable multivibrator using IC 555, it can be used as a voltage to frequency converter.

A. True
B. False
Answer» B. False
Discussion
4.

Find the approximate frequency of output waveform of a monostable multivibrator given that RC = 20 10-3 and feedback factor = 0.3.

A. 200Hz
B. 142Hz
C. 233Hz
D. Can t be found out without supply voltage value
Answer» C. 233Hz
Discussion