Question 1.
Proton carry a
A. Positive Charge
B. Negative Charge
C. Variable Charge
D. Neutral Charge
Ans: A. Positive Charge
Question 2.
Sending a frame to a group of stations is known as
A. Single casting
B. Spreading
C. Multicasting
D. Casting
Ans: C. Multicasting
Question 3.
The sharpness of a television image is termed as its
A. Clarity
B. Colour
C. Resolution
D. Graphics
Ans: C. Resolution
Question 4.
The Capacity of a communication channel is measured in
A. Band rate
B. Band width
C. Data flow
D. Bit capacity
Ans: C. Data flow
Question 5.
Which of the following is preferred for accelerating electrons?
A. Betatron
B. Cyclotron
C. Synchrotron
D. Van de Graft Generator
Ans: A. Betatron
Question 6.
What is the full form of ”AM’ regarding radio broadcasting?
A. Amplitude Movement
B. Anywhere Movement
C. Amplitude Matching
D. Amplitude Modulation
Ans: D. Amplitude Modulation
Question 7.
Which of the following is the fastest communication channel?
A. Microwave
B. Optical fiber
C. Radio wave
D. All are operating at nearly the same propagation speed
Ans: A. Microwave
Question 8.
The frequency used in TV and radar system lies in
A. VHF
B. HF
C. SHF
D. UHF
Ans: D. UHF
Question 9.
Why does’nt the hydrogen atom emit X-rays?
A. It is very small in size
B. It has only one electron
C. Its energy levels are very close to each other
D. It is highly electropositive
Ans: C. Its energy levels are very close to each other
Question 10.
Radio waves sent out by a radio stations are reflected by
A. Troposphere
B. Stratosphere
C. Mesosphere
D. Ionosphere
Ans: D. Ionosphere
Question 11.
The layer of atmosphere used for radio-wave transmission is
A. Chromosphere
B. Troposphere
C. Ionosphere
D. Stratosphere
Ans: . Ionosphere
Question 12.
Which among the following waves is used for communication by artificial satellites ?
A. Micro waves
B. Radio waves
C. A. M.
D. Frequency of 1016 series
Ans: A. Micro waves
Question 13.
What is a neuron ?
A. Basic unit of energy
B. Particle released during radioactivity
C. The anti-particle of neutron
D. Basic unit of nervous system
Ans: D. Basic unit of nervous system
Question 14.
Bandwidth is the
A. A measure of the width of a range of frequencies
B. The rate of data transfer
C. Both a & b
D. None of the above
Ans: C. Both a & b
Question 15.
What frequency range is the high frequency band?
A. 3 kHz
B. 3 to 30 MHz
C. 30 to 300 MHz
D. 10 GHz
Ans: B. 3 to 30 MHz
Question 16.
Modem is used mostly for ?
A. A modern empty memory modules
B. Connecting to internet
C. Mostly for file system
D. All the above
Ans: B. Connecting to internet
Question 17.
Which electromagnetic radiation is used for satellite communication ?
A. Ultraviolet
B. Infrared
C. Radiowave
D. Millimeter wave
Ans: D. Millimeter wave
Question 18.
Negative feedback in amplifiers
A. Increases bandwidth and decreases noise
B. Decreases bandwidth and decreases noise
C. Increases bandwidth and increases noise
D. Decreases bandwidth and increases noise
Ans: A. Increases bandwidth and decreases noise
Question 19.
In an optical fibre the signal is transmitted
A. In a straight line path
B. In a curved path
C. Due to total internal reflection
D. Due to refraction
Ans: C. Due to total internal reflection
Question 20.
Choose the most appropriate answer: In which atmospheric layer are the communication satellites located?
A.Stratosphere
B. Ionosphere
C. Troposphere
D. Mesosphere
Ans: B. Ionosphere
Physics GK MCQs all set
- Physics MCQs Set-1
- Physics MCQs Set-2
- Physics MCQs Set-3
- Physics MCQs Set-4
- Physics MCQs Set-5
- Physics MCQs Set-6
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- Physics MCQs Set-8
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- Physics MCQs Set-31
- Physics MCQs Set-32
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- Physics MCQs Set-76
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