Sources of Electromagnetic Waves

Which one of them is used to produce a propagating electromagnetic wave?

Electromagnetic waves can be produced by

Electromagnetic waves can be produced by

Microwave oven acts on the principle of:

Consider an $EM$ wave with magnetic field $B={10}^{-4}\mathrm{s}\mathrm{i}\mathrm{n}\left(\omega t-kx\right).$ The maximum value of its electric field in SI units is

Suppose that the electric field part of an electro-magnetic wave in vacuum is $\overrightarrow{E}=3.1 \cos \left[\right(1.8 y) +\hspace{0.17em}(5.4 \times {10}^8 t\left)\right] \hat{i}$. What is the direction of propagation?

Which of the following is a psychological source of stress?

When was the first communication satellite 'Telstar' launched?

Which year was the first successful transatlantic telegraph cable laid?

Which crop's demand increased in India due to the American Civil War?

Which invention significantly boosted communication in quaternary activities?

What is the primary medium of communication in quaternary activities?

Which Indian organization is responsible for satellite communications?

Which year did India launch its first communication satellite, APPLE?

What is the correct formula to calculate the gaining ratio?

Which of the following is an organizational barrier to effective communication?

Which barrier to effective communication is caused by the distortion or withholding of information to suit one's own needs?

Which of the following is considered a semantic barrier to communication?

In the communication process, who is responsible for the decoding of the message?

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