Chapter Exam

Chapter 16: Communication Systems — Online MCQ Test

Q: In a communication system, the device that receives the information signal is called the:

Answer: C. Receiver — The receiver is the final section of a communication system that detects and reconstructs the transmitted information.

Q: Which of the following is NOT an advantage of using a high-frequency carrier wave in communication?

Answer: D. Elimination of need for modulation in all cases — A high-frequency carrier helps transmission, but modulation is still needed to carry information efficiently; it does not eliminate the need for modulation.

Q: Which statement best explains why audio signals cannot be directly transmitted over long distances efficiently?

Answer: B. They require very large antennas for radiation — Audio frequencies are low, so the required antenna length would be impractically large for efficient radiation and reception.

Q: Which of the following is the correct reason for using electromagnetic waves in wireless communication rather than sound waves?

Answer: B. Electromagnetic waves can travel through vacuum — Electromagnetic waves can propagate through vacuum, which makes them suitable for wireless communication over long distances.

PHYSICS · CLASS 12 INTERMEDIATE 2 YEAR · Telangana State Board

Practice Chapter 16: Communication Systems with a free chapter-wise online MCQ test for Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR PHYSICS. This chapter covers: The final chapter details elements of communication bandwidth propagation of electromagnetic waves amplitude modulation AM demodulation and modern telecommunication basics.. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 16: Communication Systems — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR PHYSICS — Chapter 16: Communication Systems, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is the main purpose of a communication system?

A. To convert AC into DC
B. To transmit information from one place to another ✓
C. To increase the mass of a signal
D. To store electric charge

Answer: B. To transmit information from one place to another
A communication system is designed to send information from a transmitter to a receiver through a channel.

In a communication system, the device that receives the information signal is called the:

A. Modulator
B. Transmitter
C. Receiver ✓
D. Amplifier

Answer: C. Receiver
The receiver is the final section of a communication system that detects and reconstructs the transmitted information.

Which of the following is NOT an advantage of using a high-frequency carrier wave in communication?

A. Smaller size of antenna
B. Better radiation of electromagnetic waves
C. Long-distance transmission
D. Elimination of need for modulation in all cases ✓

Answer: D. Elimination of need for modulation in all cases
A high-frequency carrier helps transmission, but modulation is still needed to carry information efficiently; it does not eliminate the need for modulation.

Which statement best explains why audio signals cannot be directly transmitted over long distances efficiently?

A. Their frequencies are too high
B. They require very large antennas for radiation ✓
C. They travel slower than light
D. They cannot be amplified

Answer: B. They require very large antennas for radiation
Audio frequencies are low, so the required antenna length would be impractically large for efficient radiation and reception.

Which of the following is the correct reason for using electromagnetic waves in wireless communication rather than sound waves?

A. Electromagnetic waves require a material medium
B. Electromagnetic waves can travel through vacuum ✓
C. Sound waves have higher speed than EM waves
D. Sound waves are not affected by obstacles

Answer: B. Electromagnetic waves can travel through vacuum
Electromagnetic waves can propagate through vacuum, which makes them suitable for wireless communication over long distances.