ANALOG ELECTRONICS AND CIRCUITS

The electrical circuit used to get smooth dc output from a rectifier circuit is called

• Oscillator

• Filter

• Amplifier

• Logic Gate

In a BJT, the current gain for the common collector is given as 100. Calculate the current gain of a common emitter

• 0.99

• 0.01

• 99

• 101

It is the ratio of the change in drain current to the change in the gate to source voltage keeping drain to source voltage constant

• Dynamic drain resistance

• Transconductance

• Amplification factor

• Pinchoff voltage

Which of the following is NOT the method of amplifier coupling?

• Resistance Capacitance (RC) Coupling

• Susceptance Coupling

• Transformer Coupling

• Impedance Coupling

A transistor can be made to operate as a switch by operating it in which of the following regions?

• Active region

• Cut-off region

• Active region , Saturation region

• Saturation region, Cut-off region

Which of the following BJT configuration has highest power gain?

• Common Collector

• Common Emitter

• Common Base

• None of the above

For a BJT, the common base current gain is 0.98 and base current is 120 microammeter its common - emitter gain will be:

• 98

• 56

• 49

• 118

The maximum efficiency of a half-wave rectifier is

• 33.3%

• 40.6%

• 6606%

• 72.9%

For a transistor β = 45 and voltage drop across 1kΩ resistor, which is connected in the collector circuit is 1V. Find base current for CE configuration.

• 22mA

• 0.022mA

• 0.22mA

• 2.2mA

Which of the following devices is used in voltage regulators and voltage limiters as a fixed reference voltage in the network?

• PIN diode

• Varactor diode

• Zener diode

• Tunnel diode