ISCET Electronic Components & Circuit Analysis 3

Question 1

When a silicon diode is forward biased, the typical voltage drop across it is approximately:

Accepted Answer

0.7 V

Answer

0.1 V

Answer

0.3 V

Answer

1.2 V

Question 2

In a Wheatstone bridge circuit, the bridge is said to be balanced when:

Accepted Answer

The galvanometer reads zero current

Answer

All four resistors are equal

Answer

The supply voltage equals the output voltage

Answer

Two adjacent resistors are equal

Question 3

What does the 'Q factor' of a resonant circuit indicate?

Accepted Answer

The ratio of reactance to resistance

Answer

The total power dissipated

Answer

The cutoff frequency

Answer

The impedance at resonance

Question 4

A full-wave rectifier using a center-tapped transformer produces a ripple frequency of:

Accepted Answer

Twice the input frequency

Answer

Equal to the input frequency

Answer

Half the input frequency

Answer

Four times the input frequency

Question 5

In a common-collector (emitter follower) amplifier, the voltage gain is approximately:

Accepted Answer

Slightly less than 1

Answer

Very high (>100)

Answer

Equal to hFE

Answer

Zero

Question 6

What is the primary purpose of a snubber circuit used with switching components?

Accepted Answer

Suppress voltage transients and ringing

Answer

Increase switching speed

Answer

Reduce conduction losses

Answer

Filter harmonics from the output

Question 7

Which parameter of a capacitor determines how much charge it can store per unit voltage?

Accepted Answer

Capacitance value in farads

Answer

Dielectric strength

Answer

Equivalent series resistance (ESR)

Answer

Working voltage rating