CBSE Class 12 Electromagnetic Waves Multiple Choice Questions with Answers. MCQ Questions Class 12 Electromagnetic Waves with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Electromagnetic Waves MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Electromagnetic Waves with Answers - Set - 2
Question 1:
Which of the following EMW has highest wavelength?
(a) X-ray
(b) ultraviolet rays
(c) infrared rays
(d) microwaves
Correct Answer – (C)
Question 2 :
Choose the wave relevant to telecommunication :
(a) ultraviolet
(b) infrared
(c) microwave
(d) visible light
Correct Answer – (C)
Question 3 :
The dimensional formula of is:
(a) [MLT-2A-1]
(b) [ML0T-2A-1]
(c) [ML0T-3A-1]
(d) None of these
Correct Answer – (B)
Question 4 :
Microwaves have wavelength range:
(a) 0.1 gm to 0.7 gm
(b) 1 mm to 1 m
(c) 0.7 gm to 1 mm
(d) None of these.
Correct Answer – (B)
Question 5 :
Which one of the following is used to defect infrared radiation:
(a) spectrometer
(b) pyrometer
(c) cloud chamber
(d) bolometer.
Correct Answer – (B)
MCQ Questions Class 12 Electromagnetic Waves with Answers
Question 6 :
Electromagnetic waves have a speed of
(a) 3 × 105 kms-1
(b)3 × 106 kms-1
(c) 3 × 107 kms-1
(d) 3 × 108 kms-1
Correct Answer – (A)
Question 7 :
Which of the following laws was modified by Maxwell by introducing the displacement current?
(a) Gauss’s law
(b) Ampere’s law
(c) Biot-Savart’s law
(d).None of these
Correct Answer – (B)
Question 8 :
The dimensional formula of E is:
(a)[MLT-2A-1]
(b) [MLT-3A-1]
(c) [MLT-2A-2]
(d) None of these
Correct Answer – (B)
Question 9 :
Displacement current is-the same as:
(a) r.m.s. current
(b) conduction current
(c) peak current
(d) None of these.
Correct Answer – (B)
Question 10 :
The wavelength of infrared rays is:
(a) less than that of visible light.
(b) greater than, that of visible light.
(c) greater or lesser depending on the source.
(d) None of these.
Correct Answer – (B)
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