Electromagnetic Waves Physics - Electromagnetic Waves

A capacitor is connected to an alternating-current source. Is there a magnetic field between the plates?

Can an electromagnetic wave be deflected by an electric field or a magnetic field?

Can an electromagnetic wave be polarised?

A metal rod is placed along the axis of a solenoid carrying a high-freqμency alternating current. It is found that the rod gets heated. Explain why the rod gets heated.

In a microwave oven, the food is kept in a plastic container and the microwave is directed towards the food. The food is cooked without melting or igniting the plastic container. Explain.

The energy contained in a small volume through which an electromagnetic wave is passing oscillates with:

1. Zero frequency.
2. The frequency of the wave.
3. Half the frequency of the wave.
4. Double the frequency of the wave.

Electromagnetic waves are produced by:

1. A static charge.
2. A moving charge.
3. An accelerating charge.
4. Chargeless particles.

A free electron is placed in the path of a plane electromagnetic wave. The electron will start moving:

1. Along the electric field.
2. Along the magnetic field.
3. Along the direction of propagation of the wave.
4. In a plane containing the magnetic field and the direction of propagation.

The intensity of the sunlight reaching Earth is 1380Wm^-2. Assume this light to be a plane, monochromatic wave. Find the amplitudes of electric and magnetic fields in this wave.

A plane electromagnetic wave is passing through a region. Consider (a) electric field (b) magnetic field (c) electrical energy in a small volume and (d) magnetic energy in a small volume. Construct the pairs of the quantities that oscillate with equal frequencies.