Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Previous Year Questions)>Q 9

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The energy of the em waves is of the order of $15 keV .$ To which part of the spectrum does it belong ?

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Important Questions on Electromagnetic Waves

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Previous Year Questions)>Q 10

A laser beam is of

9 mW, diameter = 2 mm

. Then, what is the amplitude of magnetic field associated with it?

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Previous Year Questions)>Q 12

For an EM wave,

E = E_{0} \sin 12 \times 10^{6} [Z - 2 \times 10^{8} t] N C^{- 1}

in a medium. Then, its refractive index is,

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Previous Year Questions)>Q 14

Out of the following options which one can be used to produce a propagating electromagnetic wave ?

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Previous Year Questions)>Q 15

A

100 Ω

resistance and a capacitor of

100 Ω

reactance are connected in series across a

220 V

source. When the capacitor is

50 %

charged, the peak value of the displacement current is

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Previous Year Questions)>Q 16

In an electromagnetic wave,

E = 1.2 \sin (2 \times 10^{6} t - k x) N C^{- 1}

. Find the value of intensity of magnetic field.

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Previous Year Questions)>Q 20

A point source of power

15 W

is placed at a certain point in the space. The amplitude of magnetic field at a distance of

2 meter

from source is,

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Previous Year Questions)>Q 23

In EM wave,

E = 50 \sin (ω t - k x)

. If

μ = 4 μ_{0}

and

ε = ε_{0}

, then average power per unit area is,

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Previous Year Questions)>Q 24

If

\vec{H} = - 2 \cos (ω t - k z) \hat{i}

in an EM wave propagating along

+ Z

-axis, then electric field is given by,