Explore topic-wise MCQs in Wireless Mobile Communications.

This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Wireless Mobile Communications knowledge and support exam preparation. Choose a topic below to get started.

1.

Frequency demodulator is a frequency to amplitude converter circuit.

A. True
B. False
Answer» B. False
Discussion
2.

FM bandwidth is approximated using _______ rule.

A. Carson’s
B. Faraday’s
C. Maxwell’s
D. Armstrong’s
Answer» B. Faraday’s
Discussion
3.

WHICH_OF_THE_FOLLOWING_IS_USED_TO_VARY_THE_FREQUENCY_OF_THE_CARRIER_FREQUENCY_IN_ACCORDANCE_WITH_THE_BASEBAND_SIGNAL_AMPLITUDE_VARIATIONS_IN_DIRECT_METHOD_OF_FM_GENERATION.?$

A. Integrator
B. Envelope detector
C. Multivibrator
D. Voltage controlled oscillators
Answer» E.
Discussion
4.

Which of the following is not a technique for FM demodulation?$

A. Slope detection
B. Zero crossing detection
C. Product detector
D. Phase locked discriminator
Answer» D. Phase locked discriminator
Discussion
5.

Frequency_demodulator_is_a_frequency_to_amplitude_converter_circuit._State_whether_True_or_False.$

A. True
B. False
Answer» B. False
Discussion
6.

FM can improve the receiver performance through adjustment of transmitted power. State whether True or False.

A. True
B. False
Answer» C.
Discussion
7.

In angle modulation, signal to noise ratio before detection is a function of ______

A. Modulation index
B. Input signal to noise ratio
C. Maximum frequency of the message
D. IF filter bandwidth
Answer» E.
Discussion
8.

PLL in FM detection stands for ______

A. Phase locked loop
B. Programmable logic loop
C. Phase locked logic
D. Programmable locked loop
Answer» B. Programmable logic loop
Discussion
9.

Which_of_the_following_FM_demodulator_is_sometimes_known_as_pulse_averaging_discriminator?

A. Slope detection
B. Zero crossing detection
C. Quadrature detection
D. Phase locked discriminator
Answer» C. Quadrature detection
Discussion
10.

In indirect method, the carrier frequency is directly varied in accordance with the input modulating signal. State whether True or False?

A. True
B. False
Answer» C.
Discussion
11.

Which of the following are two methods for generating FM signal?

A. Coherent method, noncoherent method
B. Product detector, envelope detector
C. Direct method, indirect method
D. Slope detector, Zero crossing detector
Answer» D. Slope detector, Zero crossing detector
Discussion
12.

FM bandwidth is approximated using _______ rule

A. Carson’s
B. Faraday’s
C. Maxwell’s
D. Armstrong’s
Answer» B. Faraday‚Äö√Ñ√∂‚àö√ë‚àö¬•s
Discussion
13.

Frequency modulation index defines the relationship between the ______ and bandwidth of transmitted signal.

A. Frequency of message signal
B. Amplitude of message signal
C. Amplitude of carrier signal
D. Frequency of carrier signal
Answer» C. Amplitude of carrier signal
Discussion
14.

Frequency modulated signal is regarded as the phase modulated signal in which the modulating wave is differentiated before modulation. State whether True or False.

A. True
B. False
Answer» C.
Discussion
15.

Which of the following are two most important classes of angle modulation?

A. Amplitude modulation, frequency modulation
B. Amplitude modulation, phase modulation
C. Frequency modulation, phase modulation
D. Single sideband amplitude modulation, phase modulation
Answer» D. Single sideband amplitude modulation, phase modulation
Discussion
16.

FM is called constant envelope because ______ of carrier wave is kept constant.

A. Frequency
B. Amplitude
C. Phase
D. Angle
Answer» C. Phase
Discussion
17.

FM is a part of general class of modulation known as ______

A. Angle modulation
B. Phase modulation
C. Amplitude modulation
D. Frequency modulation
Answer» B. Phase modulation
Discussion