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Which of the following represents an infra-red wavelength?

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Important Questions on Electromagnetic Waves

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Gamma Question Bank for Engineering Physics>Chapter 22 - Electromagnetic Waves>Assignment Set-2>Q 8
If an electromagnetic wave propagating through vacuum is described by Ey=E0sin(kx-ωt);Bz=B0sin(kx-ωt), then
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Gamma Question Bank for Engineering Physics>Chapter 22 - Electromagnetic Waves>Assignment Set-2>Q 9

The figure gives the magnetic field of an electromagnetic wave at a certain point and at a certain instant. The wave transports energy in negative y-direction. Then the direction of electric field at this point and instant is

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Gamma Question Bank for Engineering Physics>Chapter 22 - Electromagnetic Waves>Assignment Set-2>Q 10
The amplitude of electric field at a distance r from a point source of power P is (taking 100% efficiency)
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Gamma Question Bank for Engineering Physics>Chapter 22 - Electromagnetic Waves>Assignment Set-2>Q 11
Displacement current exists in the region between the plates of a parallel plate capacitor if:
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Gamma Question Bank for Engineering Physics>Chapter 22 - Electromagnetic Waves>Assignment Set-2>Q 12

An electric field exists in the cylindrical region shown and is parallel to the cylinder axis. The magnitude of the field might vary with time according to any of the four graphs shown. Rank the four variations according to the magnitudes of the magnetic field induced at the edge of the region, least to greatest.

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Gamma Question Bank for Engineering Physics>Chapter 22 - Electromagnetic Waves>Assignment Set-2>Q 13
A 1.2 m radius cylindrical region containing a uniform electric field that is increasing uniformly with time. At t=0 the field is 0 and at t=5.0 s the field is 200 V m-1. The total displacement current through a cross section of the region is
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Gamma Question Bank for Engineering Physics>Chapter 22 - Electromagnetic Waves>Assignment Set-2>Q 14
A current of 1 A is used to change a parallel plate capacitor with square plates. If the area of each plate is 0.6 m2 the displacement current through an 0.3 m2 area fully between the capacitor plates and parallel to them is:
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Gamma Question Bank for Engineering Physics>Chapter 22 - Electromagnetic Waves>Assignment Set-2>Q 15
A cylindrical region contains a uniform electric field that is along the cylinder axis and is changing with time. If r is distance from the cylinder axis the magnitude of the magnetic field within the region is