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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 2
11.
An ideal op-amp has zero slew rate.
True
False
Answer: Option
Explanation:

An ideal op-amp has infinitely fast slew rate.

12.
In a bridge rectifier circuit the rms value of input ac voltage is 10 V. The PIV across each diode is
7.07 V
14.14 V
10 V
28.28 V
Answer: Option
Explanation:

PIV is 2 x 10 = 14.14 V.

13.
In a half wave diode rectifier circuit the current flows in the load circuit for
90° in each cycle
180° in each cycle
270° in each cycle
360° in each cycle
Answer: Option
Explanation:

Current flows during positive half cycle.

14.
In a push pull circuit
each transistor conducts for 180°
each transistor conducts for more than 180° but less than 360°
each transistor conducts for less than 180°
the period of conduction of each transistor depends on circuit configuration
Answer: Option
Explanation:

Since each transistor conducts for 180°. Therefore high efficiency but low distortion.

15.
A transistor with a = 0.9 and ICBO = 10 μA is biased so that IBQ = 90 μA. Then IEQ will be
5.15 mA
5.2 mA
5 mA
990 mA
Answer: Option
Explanation:

IEQ = ICQ + IBQ = 910 μA + 90 μA 990 μA.

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