68.

69.

70.

71.

72.

73.

74.

The dynamic resistance of a semiconductor diode is :
(ಗಿ) same as static resistance
(3) much larger than static resistance
060 much smaller than static resistance
(M) typically few ohms

One of the following bridge configuration is used as foeedback circuit in one of the commonly
used oseillator canfiguration : .

(ಗ) Weinbridge (B) Maxwell Weinbridge
(C) Wheat stone bridge (D) Anderson bridge

The feedback network of a certain oscillator is frequency selective and satisfies Barkhausen
Criterion for sustained oscillations at a single frequency. It implies that :

(ಹ) 1६35 ३ square wave oscillator with symmetric O/P

8 it is a sinusoidal oscillator

(0) itisa square wave oscillator with unsymmetric O/P
(D) sinusoidal oscillator with very high frequency stability

If both emitter-base and collector-base junction of a Bipolar transistor is forward biased the
transistor is in :

(ക്ര active region (18) saturation region
(C) 1770786 17೦೮೮ (D) 0೬೧೦೧ region

The multivibrator circuit configuration that can be used to convert a sinusoidal input into a
square wave output is ;

(A) Astable multivibrator (8) Monostable multivibrator
(C) Bistable multivibrator (D) Schmitt Trigger

In transistor push pull amplifier :
(A) there is no dc present in the output
(B) there is no distortion in the output
(C) there is no even harmonies in the output
(D) there is no odd harmonies in the output

The Zener diode based on Zener breakdown phenomenon have :
(ಗ) positive temperature coefficient of breakdown voltage
(8) negative temperature coefficient of breakdown voltage
(C) abreakdown voltage independent of temperature
(D) none of the above

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