Knowledge Knockout - ECE MCQ Set

The gain of a common emitter amplifier depends on:

• Load resistance

• Emitter resistance

• Collector current

• All of the above

Which feedback increases input resistance?

• Current series

• Voltage shunt

• Voltage series

• Current shunt

Crystal oscillator works on:

• Magnetostriction

• Photoelectric

• Piezoelectric

• Faraday's Law

Multistage amplifiers are used to:

• Increase input resistance

• Increase gain

• Decrease bandwidth

• Stabilize frequency

Phase margin is used to determine:

• Gain

• Frequency

• Bandwidth

• Stability

Current mirror circuit provides:

• Voltage gain

• High current

• Current copying

• Phase shift

Transconductance amplifier output is proportional to:

• Voltage input

• Current input

• Resistance

• None

Barkhausen criterion is related to:

• Amplifiers

• Filters

• Oscillators

• Rectifiers

An Op-Amp ideally has:

• Zero input impedance

• Infinite output impedance

• Infinite input impedance

• Zero gain

Differential amplifier is used in:

• Voltage regulation

• Amplification

• Oscillation

• Instrumentation