Non-inverting amplifier circuits have____________?

A. A very high input impedance
B. A very low input impedance
C. A low output impedance
D. None of the above

An OP-AMP comparator is a circuit that compares the signal voltage on one of its inputs with a ______________?

A. Non-inverting voltage at output
B. Reference voltage on the other
C. Virtual input
D. Output

The working of transistor as amplifier is similar to________________?

A. Step up transformer
B. Step down transformer
C. Three diodes in common
D. Triode vacuum tube

To obtain a p-type semi-conductor Si Crystal must be doped with foreign atoms whose valency is_____________?

A. 2
B. 3
C. 4
D. 5

The alternating voltage is an example of_______________?

A. A digital waveform
B. An analogue waveform
C. Discrete waveform
D. None at all

The especially designed semiconductor diodes used as indicator lamps in electronic circuits are___________?

A. The switch
B. The light emitting diode
C. The photo diodes
D. Solar cells.

Semi-conductors with donor atoms and free electrons belong to the type________________?

A. N
B. P
C. Mix
D. Any of above

In p-n-p transistor the collector current is________________?

A. Equal to emitter current
B. Slightly less than emitter current
C. Greater than emitter current
D. Any of above

The simplest type of rectification known as half wave rectification is obtained by____________________?

A. Using a transistor
B. Suppressing the harmonics in a.c voltage
C. Suppressing half wave of a.c supply by using diode
D. Using a coolidge tube

Depletion region of a junction is formed_____________?

A. During the manufacturing process
B. Under forward bias
C. Under reverse bias
D. When temperature varies