Analog Electronics

This is an MCQ-based quiz on Analog Electronics.

This includes CMRR, Bandwidth, Slew rate, and Open-loop gain.

Start Quiz

For a base current of 10 μA, what is the value of collector current in common emitter if βdc = 100

10 μA 100 μA 10 mA 1 mA

If an amplifier with a gain of – 1000 and feedback factor β = – 0.1 had a gain change of 20% due to temperature, the change in the gain of the feedback amplifier would be …………….

10% 5% 0.2% 0.01%

An RC coupled amplifier has an open loop gain of 200 and a lower cutoff frequency of 50 Hz. If negative feedback with β = 0.1 is used, the lower cut off frequency will be ……………

about 50 Hz about 5 Hz about 2.38 Hz about 70.5 Hz

What will happen if doping of an intrinsic semiconductor with pentavalent impurity atom ?

Fermi level not change Fermi level fall Fermi level raises All of the above

What is the condition if no external potential energy is applied to the PN junction then diode ?

Forward biased Reversed biased Zero Bias None of These

A constant current signal across a parallel RLC circuits gives an o/p of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ. At the frequency of 4KHZ,the o/p voltage will be

1v 2v 1.4v 2.8v

What is an energy gap?

Space between two orbital shells Energy band in which electrons can move freely Energy level at which an electron can exist None of the above

To prevent a DC return between source and load, it is necessary to use

Resistor between source and load Inductor between source and load Capacitor between source and load Either A or B

In a p⁺n junction diode under reverse bias , the magnitude of electric field is maximum at

The edge of the depletion region on the p-side The edge of the depletion region on the n-side The p⁺n junction The center of the depletion region on the n-side

In a CB amplifier the maximum efficiency could be

99% 85% 50% 25%

The bandwidth of an RF tuned amplifier is dependent on

Q –factor of the tuned o/p circuit Q –factor of the tuned i/p circuit Quiescent operating point Q-factor of the o/p and i/p circuits as well as quiescent operating point

To prevent a DC return between source and load, it is necessary to use ………………

Resistor between source and load

Inductor between source and load

Capacitor between source and load

Either (1) or (2)

The load impedance ZL of a CE amplifier has R and L in series. The phase difference between output and input will be ………….

180°

More than 90° but less than 180°

More than 180° but less than 270°

When the JFET is no longer able to control the current, this point is called the -

Depletion region.

Pinch-off region