Q. The absolute values of pinch-off voltage and gate-source cut-off voltage are

View solution

Q. Which of the following circuit does not need a coupling capacitor?

View solution

Q. Assertion (A): A large negative feedback is deliberately introduced in an amplifier to make its gain independent of variation is in parameters of active device and other components.

Reason (R): A large negative feedback results in a high value of return difference compared to unity which makes the feedback gain inversely proportional to feedback factor.

View solution

Q. In case of a transistor amplifier the emitter resistance Re is removed

View solution

Q. In oscillators class C operation is preferred because

View solution

Q. In a common emitter circuit all voltages are measured with respect to

View solution

Q. The h parameter equivalent to ac resistance re is

View solution

Q. The theoretical maximum efficiency of a half wave diode rectifier is

View solution

Q. Which of the following statement is correct?

View solution

Q. In a transistor push pull amplifier

View solution

Q. In a self bias circuit for CE amplifier, the base voltage is

View solution

Q. A push pull amplifier is a

View solution

Q. An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. How much feedback should be used to provide the desired level?

View solution

Q. Which of the following oscillator circuits uses three capacitors in the phase shifting network?

View solution

Q. Consider the following rectifier circuits :

1. half-wave rectifier without filter
2. full-wave rectifier without filter
3. full-wave rectifier with series inductance filter
4. full-wave rectifier with capacitance filter.

The sequence of these rectifier circuits in decreasing order of their ripple factor is

View solution

Q. When a transistor is to be at a temperature above 25°C

View solution

Q. Assertion (A): In monolithic IC the components are part of one chip

Reason (R): An op-amp is a high gain dc amplifier

View solution

Q. The most widely used LC oscillator is

View solution

Q. Which of the following statement is wrong?

View solution

Q. The disadvantage of FET over BJT is

View solution