Analog Communications Mock Test 6

10%

Question 1 of 10

1. Why the bandwidth of an FM signal is considered to be limited?

because it is equal to the frequency deviation

because there can only be a finite number of sidebands

because it is band-limited at the receiver

because the power in the outer sidebands is negligible

Question 1 of 10

Question 2 of 10

2. What we called a resistor if a transmitter is connected to a resistor instead of an antenna?

a test load

a dummy load

a heavy load

a temporary load

Question 2 of 10

Question 3 of 10

3. What is the modulation index for getting maximum power in amplitude modulated system?

0.3

0.8

¹⁄₂

Question 3 of 10

Question 4 of 10

4. What is the full form of NBFM?

Near band frequency modulation

National broadcast frequency modulation

Narrow band frequency modulation

Non broadcast frequency modulation

Question 4 of 10

Question 5 of 10

5. What is the two basic specifications of a receiver?

signal and noise

superious response and tracking

sensitivity and selectivity

number of convertors and number of IFs

Question 5 of 10

Question 6 of 10

6. Which two networks can be used for impedance matching?

bridge network and T network

pi network and omega network

pi network and T network

pi network and bridge network

Question 6 of 10

Question 7 of 10

7. Which statement is true about indirect FM modulator?

it differentiates the modulating signal

it integrates the modulating signal

varies the phase of carrier oscillator

varies the frequency of carrier oscillator

Question 7 of 10

Question 8 of 10

8. How an AM radio station increase its signal-to-noise ratio?

by increasing the frequency

by maintaining a constant modulation index

by decreasing its modulation index

by increasing its modulation index

Question 8 of 10

Question 9 of 10

9. If AM radio station increases its modulation index then there is an increase in receiving RF signal.

False

True

Question 9 of 10

Question 10 of 10

10. What will be the reason of miller effect in BJT?

base-to-collector capacitance

inductance of collector load

base-to-emitter capacitance

collector-to-emitter capacitance

Question 10 of 10