Analog Circuits Mock Test 7

10%

Question 1 of 10

1. The performance of heat sink does not depend upon ___________

Protrusion design

Choice of material

Surface treatment

None of the mentioned

Question 1 of 10

Question 2 of 10

2. Which of the following is not an LC oscillator?

Crystal oscillator

Colpitts oscillator

Clapp oscillator

Hartley Oscillator

Question 2 of 10

Question 3 of 10

3. In an oscillator if phase of feedback is same as that of oscillation waveform then feedback is called ___________

Cannot be predicted

Positive feedback

Negative feedback

Either positive or negative depending upon frequency

Question 3 of 10

Question 4 of 10

4. Frequency of oscillation for three section RC phase shift network is given by ___________

1/(2ᴨ√6 RC)

1/(ᴨ√6 RC)

1/(2√6 RC)

2/(ᴨ√6 RC)

Question 4 of 10

Question 5 of 10

5. Cavities embedded in heat source is also known as ___________

Sink hole

Low sink

On-sink

Inverted sink

Question 5 of 10

Question 6 of 10

6. Why does no DC current flow in the primary winding of the output transformer of class B push-pull amplifier?

Because the net impedance is very high to allow flow of current

The winding only allows AC current to flow

Current only flows in secondary winding due to the presence of load at that side

Because DC currents from both transistors flow in opposite directions

Question 6 of 10

Question 7 of 10

7. One phase shift network of an RC phase shift oscillator contain __________ capacitor.

Question 7 of 10

Question 8 of 10

8. Difference between the active heat sink and passive heat sink is that passive heat sink?

Possess mechanical components

Do not possess metal components

Do not possess mechanical components

Possess electrical components

Question 8 of 10

Question 9 of 10

9. What will be oscillator frequency, if phase shift network of 3stages of RC phase shift oscillator contains a capacitor of 7nF and a resistance of 10K in each stage?

928 Hz

895Hz

1.2KHz

1KHz

Question 9 of 10

Question 10 of 10

10. The following circuit is provided. R1=R2 and C1=C2.

What is the correct choice for sustained oscillation?

R1 = R2 = R3 = R4

R4 = 3R3

R1 = R2

R4 = 2R3

Question 10 of 10