BSEB Class 12 Physics Chapter 15 Communication System MCQ
BSEB Class 12 Physics Chapter 15 Communication System MCQ In English | Class 12th Physics mcq on communication system In English Medium | Class 12th English Objective Question | English Chapter Wise Summary | electromagnetic waves and communication system mcq | MCQ Questions for Class 12 Physics Chapter 15
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BSEB Class 12 Physics Chapter 15 Communication System MCQ In English
1. Which frequency range is used for TV transmission ?
- (A) 30 HZ – 300 Hz
- (B) 30 KHZ – 300 kHZ
- (C) 30 MHz – 300 MHz
- (D) 30 GHz – 300 GHZ
Show Answer
(C) 30 MHz – 300 MHz
2. Sky wave communication is based upon
- (A) reflection by ionosphere
- (B) absorption by ionosphere
- (C) transmission through ionosphere
- (D) none of these
Show Answer
(A) reflection by ionosphere
3. The loss of strength of a signal while propagating though a medium is known as
- (A) reception
- (B) absorption
- (C) transmission
- (D) attenuation
Show Answer
(D) attenuation
4. The process of increasing the strength of a signal using an electronic circuit is called
- (A) amplification
- (B) modulation
- (C) demodulation
- (D) transmission
Show Answer
(A) amplification
5. Modem is a device which performs
- (A) modulation
- (B) demodulation
- (C) rectification
- (D) modulation and demodulation
Show Answer
(D) modulation and demodulation
6. The mode of propagation used by short wave broadcast services is
- (A) space wave
- (B) sky wave
- (C) ground wave
- (D) both ‘A’ and ‘C’
Show Answer
(B) sky wave
7. Large bandwidth for higher data rate is achieved by using
- (A) high frequency carrier wave
- (B) high frequency audio wave
- (C) low frequency carrier wave
- (D) low frequency audio wave
Show Answer
(A) high frequency carrier wave
8. Who invented world wide web?
- (A) J.C.R. Licklider
- (B) Tim Berners-Lee
- (C) Alexander Graham Bell
- (D) Samuel F.B. Morse
Show Answer
(B) Tim Berners-Lee
9. The device which is a combination of a receiver and a transmitter is
- (A) Amplifier
- (B) Repeater
- (C) Transducer
- (D) Modulator
Show Answer
(B) Repeater
10. Which of the following is not a transducer ?
- (A) Loudspeaker
- (B) Amplifier
- (C) Microphone
- (D) All of these
Show Answer
(B) Amplifier
11. Which of the following is an example of broadcast mode of communication?
- (A) Radio
- (B) Television
- (C) Mobile
- (D) Both A and B
Show Answer
(D) Both A and B
12. Who undertook the first space walk and in which year?
- (A) Leonov, 1965
- (B) Neil Armstrong, 1969
- (C) Rakesh Sharma, 1998
- (D) None of these
Show Answer
(A) Leonov, 1965
13. The term used to collect the information about an object and a place without physical contact” is called
- (A) modulation
- (B) communication
- (C) amplification
- (D) remote sensing
Show Answer
(D) remote sensing
14. From which layer of atmosphere are radio waves reflected ?
- (A) Ionosphere
- (B) Mesosphere
- (C) Chromosphere
- (D) None
Show Answer
(A) Ionosphere
15. The output of a digital computer is an example of
- (A) digital signal
- (B) analog signal
- (C) both (A) and (B)
- (D) neither (A) nor (B)
Show Answer
(A) digital signal
16. Basically, a communication system is a
- (A) transmitter
- (B) receiver
- (C) messenger
- (D) All of these
Show Answer
(D) All of these
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Class 12th Physics mcq on communication system In English Medium On Bihariacademy
| Pattern Based | Bihar Board, Patna |
| Class | 12th |
| Stream | Science (I.Sc) |
| Subject | Physics |
| Type Of Question | Objective Question || 01 Marks |
| Script | Hindi And English Meadium |
| Published On | Bihari Academy |
FAQ. Class 12 Physics Chapter 15 Communication System MCQ
Q1. The specific resistance of conductor increase with
Ans:- increase of temperature
Q2. Which one of the following is the best material for making connecting wires?
Ans:- Copper