Physics – Class 12 Mock Test 10

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Question 1 of 10

1. What is the maximum power rating for an IC?

1000 W

1 W

100 W

10 W

Question 1 of 10

Question 2 of 10

2. Which one of the following is a way to produce a signal?

Superimposition with a transmitted signal

Superimposition with a carrier signal

Superimposition with a received signal

No superimposition is required

Question 2 of 10

Question 3 of 10

3. Identify a suitable frequency for skywave propagation.

From 2 MHz to 50 MHz

From 2 MHz to 80 MHz

From 2 MHz to 30 MHz

Upto 2 MHz

Question 3 of 10

Question 4 of 10

4. What is the frequency range for a speech signal?

20 kHz to 20 MHz

20 Hz to 20 kHz

30 Hz to 310 Hz

300 Hz to 3100 Hz

Question 4 of 10

Question 5 of 10

5. A TV signal is allocated with a bandwidth of 6 MHz.

False

True

Question 5 of 10

Question 6 of 10

6. Which of the following is true about carrier signal?

Carrier signals and message signals are the same

Carrier signals are used to increase the wavelength of the signal

Carrier signals have low frequency

Carrier signals have high frequency

Question 6 of 10

Question 7 of 10

7. What is the form factor for a full-wave rectifier?

1.57

0.453

2.62

1.11

Question 7 of 10

Question 8 of 10

8. What can a p-n junction diode be used as?

Rectifier

Amplifier

Condenser

Regulator

Question 8 of 10

Question 9 of 10

9. Find the true statement.

The value of the harmonic is independent of its contribution to the waveform

The value of the harmonic is directly proportional to its contribution to the waveform

The value of the harmonic is inversely proportional to its contribution to the waveform

The value of the harmonic is equal to its contribution to the waveform

Question 9 of 10

Question 10 of 10

10. The current gain of a transistor in a common emitter configuration is 50. If the emitter current is 5.5 mA, find the base current.

0.107 A

0.107 mA

0.203 A

0.203 mA

Question 10 of 10