The electric field of a plane electromagnetic wave is given by E → = E 0 i ^ c o s k z c o s ( ω t ) The corresponding magnetic field B → is then given by:

B → = E 0 c j ^ sin ⁡ k z s i n ( ω t )

B → = E 0 c j ^ cos ⁡ k z s i n ( ω t )

B → = E 0 c k ^ sin ⁡ k z c o s ( ω t )

B → = E 0 c j ^ sin ⁡ k z c o s ( ω t )

Match List - I with List - II. List-I List-II (a) Source of microwave frequency (i) Radioactive decay of nucleus (b) Source of infrared frequency (ii) Magnetron (c) Source of Gamma Rays (iii) Inner shell electrons (d) Source of X -rays (iv) Vibration of atoms and molecules (v) LASER (vi) RC circuit Choose the correct answer from the options given below:

(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

(a)-(ii), (b)-(iv), (c)-(vi), (d)-(iii)

(a)-(vi), (b)-(iv), (c)-(i), (d)-(v)

(a)-(vi), (b)-(v), (c)-(i), (d)-(iv)

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Which element of communication involves the process of converting the message into symbols?

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Important Questions on Electromagnetic Waves

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Electromagnetic waves can be deflected by

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

The electric field of a plane electromagnetic wave is given by

\vec{E} = E_{0} \hat{i} c o s (k z) c o s (ω t)

The corresponding magnetic field

\vec{B}

is then given by:

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Write an expression for the speed of light in a material medium of relative permittivity

ε_{r}

and relative magnetic permeability

μ_{r}

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Which of the following statements is correct?

a. rRNA is the most abundant RNA.
b. Ribosomes are composed of approximately 80% rRNA and 20% ribosomal proteins.
c. rRNA is a type of coding RNA.

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Long distance short- wave radio broadcasting uses

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

The equivalent of a structural gene is:

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

What do you understand by the statement, “Electromagnetic waves transport momentum”?

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

What is transcription?

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Equation for wave vector is:

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

A red $L E D$ emits light at $0.1 watt$ uniformly around it. The amplitude of the electric field of the light at a distance of $1 m$ from the diode is:

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Spliceosomes are not found in cells of:

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Match List - I with List - II.

List-I		List-II
(a)	Source of microwave frequency	(i)	Radioactive decay of nucleus
(b)	Source of infrared frequency	(ii)	Magnetron
(c)	Source of Gamma Rays	(iii)	Inner shell electrons
(d)	Source of $X$ -rays	(iv)	Vibration of atoms and molecules
		(v)	LASER
		(vi)	RC circuit