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NCERT Class 12 Physics Chapters
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1.
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In the process of charging of a capacitor, the current produced between the plates of the capacitor is:
(a)
 (b)  (c)  (d)  where symbols have their usual meanings.
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2.
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A capacitor is charged by a battery. Between the plates, during process of charging:
(a) only displacement current exists.
(b) only conduction current exists.
(c) both displacement current and conduction current exist.
(d) no current exists.
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3.
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Displacement current exists only when
(a) electric field is changing. (b) magnetic field is changing.
(c) electric field is not changing. (d) magnetic field is not changing.
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4.
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The direction of propagation of the wave is along.
(a)
 (b) E (c)  × (d) × |
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5.
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The ratio of the magnitudes of the electric field and magnetic field of a plane electromagnetic wave is
(a) 1 (b) |
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1.
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What is meant by the term ‘displacement current’? Briefly explain how this current is different from a conduction current.
(CBSE 2023, 2M)
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2.
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What is a displacement current? How is it different from a conduction current?
(CBSE 2023, 2M)
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3.
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How does an oscillating charge radiate an electromagnetic wave? Give the relation between the frequency of radiated wave and the frequency of oscillating charge.
(CBSE 2020, 2M)
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4.
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A parallel plate capacitor of plate area A each and separation d, is being charged by an ac source. Show that the displacement current inside the capacitor is the same as the current charging the capacitor.
(CBSE 2019, 2M)
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5.
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Define displacement current. What role does it play while charging a capacitor by dc source. Is the value of displacement current same as that of the conduction current? Explain.
(CBSE 2019, 3M)
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Chapter Name
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Sub Topics of Chapter 8: Electromagnetic Waves
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Electromagnetic Waves
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8.1 Introduction
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8.2 Displacement Current
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8.3 Electromagnetic Waves
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8.4 Electromagnetic Spectrum
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8.5 Applications of Electromagnetic Waves
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and 
represent the electric and the magnetic field of an electromagnetic wave respectively. 
(c) c (d) 
