fundcom/electronics/eelectrical equipment

fundcom/electronics/eelectrical equipment

University

111 Qs

quiz-placeholder

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fundcom/electronics/eelectrical equipment

fundcom/electronics/eelectrical equipment

Assessment

Quiz

Other

University

Practice Problem

Easy

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111 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following characteristics of a sine wave can be modulated?

amplitude

angular phase

angular velocity

all of these

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The following are advantages of modulation except

allow the use of practical-size antenna

separate differing transmission

circuit simplicity

overcomes difficulty in transmission at low frequencies

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Amplitude modulation generated at a very low voltage or power amplifier is

modulation.

minimum

collector

high-level

low-level

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In AM, carrier amplitude variation depends on modulating signal's

amplitude

frequency

amplitude and frequency

none of these

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A 400 watts carrier is modulated to a depth of 75 percent. Calculate the total power in the modulated wave.

512.5 W

500 W

530 W

515.5 W

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the receive signal is 600 kHz in an AM broadcast, what is the local oscillator frequency?

600 kHz

145 kHz

1055 kHz

455 kHz

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The instantaneous voltage of modulated FM carrier is given by v = 10 sin (750x10 t + 10 sin 1000t). The carrier frequency is

750 MHz

1000 MHz

119.37 MHz

1000 Hz

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