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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 2
41.
The ripple factor of a half wave rectifier is more than 2.
True
False
Answer: Option
Explanation:

Ripple factor of half wave rectifier is 1.21 .

42.

Assertion (A): The circuit in figure produces repetitive narrow pulses when input is fed with sine or triangular waveform having peak value more than + V

Reason (R): The high gain op-amp produces voltages at two levels. If input is more than + V, the output is + 15 V otherwise the output is - 15 V.

Both A and R are correct and R is correct explanation for A
Both A and R are correct but R is not correct explanation for A
A is correct R is wrong
A is wrong R is correct
Answer: Option
Explanation:

It is a comparator circuit.

43.
In a CE amplifier drives a low load resistance directly the result will be
overloading of amplifier
underloading of amplifier
overloading or underloading of amplifier depending on circuit
none of the above
Answer: Option
Explanation:

Low load resistance means high current and hence over loading.

44.
For CE amplifier of figure, the slope of ac load line is
Answer: Option
Explanation:

For ac, RL and RC appear in parallel.

Hence .

45.
For high frequencies a capacitor like
an open circuit
a short circuit
either open circuit or short circuit
none of the above
Answer: Option
Explanation:

. If w is very high, XC, is nearly zero.

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