A half wave diode rectifier has a capacitance input filter. If input voltage is

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Question
A half wave diode rectifier has a capacitance input filter. If input voltage is V_m sin ?t, PIV is
Options
A. V_m
B. 2 V_m
C. 3 V_m
D. 4 V_m

Correct Answer

2 V_m

Explanation

Because capacitor charge is retained.

Analog Electronics problems

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2. In figure v₁ = 8 V and v₂ = 4 V. Which diode will conduct?
Options
A. D₂ only
B. D₁ only
C. Both D₁ and D₂
D. Neither D₁ nor D₂

3. To protect the diodes in a rectifier and capacitor input filter circuit it is necessary to use
Options
A. surge resistor
B. surge inductor
C. surge capacitor
D. both (a) and (b)

5. If an amplifier with gain of - 1000 and feedback factor ? = - 0.1 had a gain change of 20% due to temperature, the change in gain of the feedback amplifier would be
Options
A. 10%
B. 5%
C. 0.2%
D. 0.01%

6. The efficiency of a full wave rectifier using centre tapped transformer is twice that in full wave bridge rectifier.
Options
A. True
B. False

7. The transistor of following figure in Si diode with a base current of 40 ?A and I_CBO = 0, if V_BB = 6V, R_E = 2 k? and ? = 90, I_BQ = 20 ?A then R_B =
Options
A. 200 k?
B. 265 k?
C. 150 k?
D. 100 k?

8. If the input to the ideal comparator shown in the figure is a sinusoidal signal of 8 V (peak to peak) without any DC component, then the output of the comparator has a duty cycle of
Options
A. 1/2
B. 1/3
C. 1/6
D. 1/12

9. For a system to work, as oscillator the total phase shift of the loop gain must be equal to
Options
A. 90�
B. 45�
C. 270�
D. 360�

10. The input impedance of op-amp circuit of figure is
Options
A. 120 k ohm
B. 110 k ohm
C. infinity
D. 10 k ohm

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