IMA

Electromagnetic waves are produced by

• A static charge

• An accelerated charge

• A moving charge

• Charged particles

Which of the following rays are not electromagnetic waves?

• Gamma rays

• Beta rays

• Heat rays

• X rays

Which property of an electromagnetic wave, depends on the medium in which it is travelling?

• Velocity

• Time period

• Frequency

• Amplitude

Electromagnetic waves are represented in which of the following format?

• Longitudinal waved

• Transverse waves

• Sinusoidal waves

• Surface waves

Which of the following are false for electromagnetic waves

• Transverse waves

• Surface waves

• Longitudinal waves

• Produced by accelerating charges

Which of the following electromagnetic radiation is used for viewing objects through fog

• X rays

• Light waves

• Gamma rays

• Infrared

During the propagation of electromagnetic waves in a medium:

• electric energy density is double of the magnetic energy density

• electric energy density is half of the magnetic energy density

• electrical energy is equal to the magnetic energy density

• both electric and magnetic energy densities are zero

The electric and magnetic fields of an electromagnetic wave are

• In phase and perpendicular to each other

• out of phase and not perpendicular to each other

• in phase and not perpendicular to each other

• out of phase and perpendicular to each other

Which of the following statement is false for the properties of electromagnetic waves?

• Both electric and magnetic field vectors attain the maxima and minima at the same place and same time.

• The energy in electromagnetic waves is divided equally between electric and magnetic field vectors.

• Both electric and magnetic field vectors are parallel to each other and perpendicular to the direction of propagation of wave.

• These waves do not require any material medium for propagation.

Which of the following has/have zero average value in a plane electromagnetic wave?

• Both magnetic and electric fields

• Electric field only

• Magnetic field

• None of these