Define 'modulation index' in AM.

Important Questions on Space Communication

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 21 - Space Communication>MODEL QUESTIONS>Q 9

Define 'modulation index' in FM.

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 21 - Space Communication>MODEL QUESTIONS>Q 10

Write the expression for power carried by AM carrier wave.

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 21 - Space Communication>MODEL QUESTIONS>Q 11

By what percentage will the transmission range of a TV tower be affected when the height of the tower is increased by $21\%$.

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 21 - Space Communication>MODEL QUESTIONS>Q 12

What is the range of frequencies used for TV transmission? What is common between these waves and light waves?

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 21 - Space Communication>MODEL QUESTIONS>Q 1

The peak-to-peak value of AM voltage has a maximum value of $5 \mathrm{V}$ and a minimum value of $1 \mathrm{V}$. If the depth of modulation be $0.7$. What is the amplitude of the unmodulated carrier wave?

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 21 - Space Communication>MODEL QUESTIONS>Q 2

A $1 \mathrm{KW}$ carrier is amplitude modulated by an audio signal. If the modulation is $60\%$, determine the total power of the modulating wave.

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 21 - Space Communication>MODEL QUESTIONS>Q 3

In AM broadcast transmitter radiates a power of $50 \mathrm{KW}$. If the modulation factor is $0.8$, calculate the carrier power and power of the side frequencies.

EASY

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 21 - Space Communication>MODEL QUESTIONS>Q 4

A $80 \mathrm{MHz}$ carrier is frequency modulated, the modulation index being $4$. The frequency of the information signal is $10 \mathrm{kHz}$. What is the maximum frequency deviation?