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In a zener diode with high breakdown voltage
(A) Both P andN are heavily doped (8) Either P or N is lightly doped
(C) Both P and N are lightly doped (D) None of the above

Most of the holes present in the base of a PNP transistor flow
(A) ബം the emitter (ए) 1110 the collector
(C) 1110 the supply 0) out of base into the base least

A JFET configuration which connects a high resistance signal source to a low resistance

load is
(A) _ source follower (B) common source
(C) common drain (D) common gate

When class B power amplifier is in a quiescent state,
(A) _ half of the maximum current flows through the transistor.
(B) maximum current flows through the transistor.
(C) 10 current flows through the transistor.
(D) quarter of the maximum current flows.

Inductor filter should be used when
(A) 1090 current is high (B) 1080 current is low
(೮) _ high load resistance रि, (D) none of the above

In a Wien-bridge oscillator, if the resistances in the positive feedback circuit are
decreased, the frequency

(A) remains the same (B) decreases

(C) increases 0) insufficient data

When frequency of oscillation of a crystal oscillator becomes parallel resonance
frequency, reactance of crystal oscillator becomes ⋅
(^^) पीपा (8) Zero
(C) Unpredictable (D) Unity

The distortion in an amplifier is found to be 3%, when the feedback ratio of negative
feedback amplifier is 0.04. When the feedback is removed, the distortion becomes 15%.
Then the open loop gain (A) is ⋅

(^) 50 ൫ 90

(൭ 150 (D) 100

Voltage gain of an amplifier without feedback is 60 dB. It decreases to 40 dB with
feedback. Then the feedback factor is
(A) 0.0095 (B) 0.00833
(C) 0.00675 (D) 0.00456
7 004/2021
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