A plane electromagnetic wave is propagating along the direction i ^ + j ^ 2 , with its polarization along the direction k . ^ The correct form of the magnetic field of the wave would be (here B 0 is an appropriate constant):

B 0 i ^ - j ^ 2 c o s ω t - k i ^ + j ^ 2

B 0 j ^ - i ^ 2 c o s ω t + k i ^ + j ^ 2

B 0 k ^ c o s ω t - k i ^ + j ^ 2

B 0 i ^ + j ^ 2 c o s ω t - k i ^ + j ^ 2

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What do you mean by ground wave?

Important Questions on Communication System

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Physics>Modern Physics>Communication System>Propagation of Electromagnetic Waves in Atmosphere

The frequency suitable for beyond-the-horizon communication using sky waves is

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Physics>Modern Physics>Communication System>Propagation of Electromagnetic Waves in Atmosphere

The physical sizes of the transmitter and receiver antenna in a communication system are:

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Physics>Modern Physics>Communication System>Propagation of Electromagnetic Waves in Atmosphere

For television broadcasting the frequency employed is normally in range,

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Physics>Modern Physics>Communication System>Propagation of Electromagnetic Waves in Atmosphere

Which mode of propagation uses ionosphere to reflect the transmitted signals from the Earth ? State other two modes of propagation.

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Physics>Modern Physics>Communication System>Propagation of Electromagnetic Waves in Atmosphere

A plane electromagnetic wave of wavelength

λ

has an intensity

I

. It is propagating along the positive

Y -

direction. The allowed expressions for the electric and magnetic fields are given by:

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Physics>Modern Physics>Communication System>Propagation of Electromagnetic Waves in Atmosphere

The waves suitable for transmission of radio signals are

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Physics>Modern Physics>Communication System>Propagation of Electromagnetic Waves in Atmosphere

A plane electromagnetic wave is propagating along the direction

\frac{\hat{i} + \hat{j}}{\sqrt{2}},

with its polarization along the direction

\hat{k .}

The correct form of the magnetic field of the wave would be (here

B_{0}

is an appropriate constant):

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Physics>Modern Physics>Communication System>Propagation of Electromagnetic Waves in Atmosphere

Which type of communication is employed in mobile phones?

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Physics>Modern Physics>Communication System>Propagation of Electromagnetic Waves in Atmosphere

A transmitting antenna at the top of a tower has a height $32 m$ and the height of the receiving antenna is $50 m$ . What is the maximum distance between them for satisfactory communication in line of sight (LOS) mode?

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Physics>Modern Physics>Communication System>Propagation of Electromagnetic Waves in Atmosphere

Long-range radio transmission is possible when the radio waves are reflected from the ionosphere. For this to happen the frequency of the radio waves must be in the range:

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Physics>Modern Physics>Communication System>Propagation of Electromagnetic Waves in Atmosphere

An EM wave is propagating in a medium with a velocity