MCQ Questions for Class 12 Physics Chapter 15 Communication Systems Part-1 with Answers

Communication Systems Part-1 Class 12 Physics MCQs Questions with Answers

Check the below NCERT MCQ Questions for Class 12 Physics Chapter 15 Communication Systems Part-1 with Answers Pdf free download. MCQ Questions for Class 12 Physics with Answers were prepared based on the latest exam pattern. We have Provided Communication Systems Part-1 Class 12 Physics MCQs Questions with Answers to help students understand the concept very well.

Class 12 Physics Chapter 15 Quiz

Class 12 Physics Chapter 15 MCQ Online Test

You can refer to NCERT Solutions for Class 12 Physics Chapter 15 Communication Systems Part-1 to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Communication Systems Part-1 Class 12 Physics MCQ online test

Q1.	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

Ans: Leonov 1965

Q2.	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

Ans: remote sensing

Q3.	The velocity of electromagnetic wave is:
	A.3 × 10⁵ ms^-1
	B.3 × 10⁶ ms^-1
	C.3 × 10⁸ ms^-1
	D.3 × 10¹⁰ ms^-1

Ans: 3 × 10⁸ ms^-1

Q4.	The audio frequencies range from:
	A.20 Hz to 20.000 kHz
	B.20 Hz to 20 kHz
	C.20 kHz to 20.000 kHz
	D.None of these

Ans: 20 Hz to 20 kHz

Q5.	The wavelength of a wave of frequency 10 kHz is:
	A.30 m
	B.300 m
	C.30 km
	D.300 km

Ans: 30 km

Q6.	The area served by an antenna of height 100 m is:
	A.10⁹m²
	B.4 × 10⁹ m²
	C.6 × 10⁹m²
	D.8 × 10¹⁰m²

Ans: 4 × 10⁹ m²

Q7.	Which of the following is not transducer?
	A.Loudspeaker
	B.Amplifier
	C.Microphone
	D.All

Ans: Amplifier

Q8.	The space waves which are affected seriously by atmospheric conditions are:
	A.MF
	B.HUF
	C.VHF
	D.UHF

Ans: UHF

Q9.	An antenna is:
	A.Inductive
	B.Capacitive
	C.Resistive
	D.A transformer

Ans: Inductive

Q10.	Broadcasting antenna are generally:
	A.Ommi directional type
	B.Vertical type
	C.Horizontal type
	D.None

Ans: Vertical type

Q11.	The modulation index in amplitude modulation is:
	A.Always zero
	B.Between 0 and 1
	C.Between 1 and ∞
	D.None of these

Ans: Between 1 and ∞

Q12.	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)

Ans: digital signal

Q13.	Name the man who was first to place his foot on the moon and in which year:
	A.Neil Armstrong, 1969
	B.James Van A lien, 1971
	C.Leonov, 1965
	D.None of these

Ans: Neil Armstrong, 1969

Q14.	A microphone converts:
	A.sound signals into electrical signals
	B.electrical signals into sound signals
	C.both (a) and (b)
	D.Neither (a) nor (b)

Ans: sound signals into electrical signals

Q15.	A loudspeaker converts:
	A.electrical signals into sound signals
	B.sound signals into electrical signals
	C.both (a) and (b)
	D.neither (a) nor (b)

Ans: electrical signals into sound signals

Q16.	The sound produced by a tuning fork is a sort of:
	A.analog signal
	B.digital signal
	C.both (a) and (b)
	D.neither (a) nor (b)

Ans: analog signal

Q17.	The length of a half wave dipole at 30 mega-hertz is:
	A.5 m
	B.10 m
	C.25 m
	D.80 m

Ans: 5 m

Q18.	In space communication, the sound waves can be sent from one place to another:
	A.through space
	B.through wires
	C.by superimposing it on undamped electro-magnetic waves
	D.by superimposing it on damped electro-magnetic waves