Electromagnetic waves

Which of the following is not electromagnetic waves

• UV rays

• Gamma rays

• β rays

• X-rays

To which part of the spectrum does EM waves belong if the energy of the wave is of the order of 15 KeV

• X rays

• Infrared rays

• Ultraviolet rays

• Gamma rays

Which among the following has the maximum penetrating power?

• Radio waves

• Microwaves

• Ultraviolet radiation

• Gamma rays

Which of the following is called heat radiation?

• X-rays

• Gamma rays

• Microwave

• Infrared radiation

Displacement current was first postulated by

• Ampere

• Maxwell

• Hertz

• Marconi

The magnetic field in a travelling electromagnetic wave has a peak value of 20nT. The peak value of electric field strength

• 3 V/m

• 6 V/m

• 9 V/m

• 12 V/m

Maxwell’s equations describe the fundamental laws of

• Electricity only

• Magnetism only

• Mechanics only

• Both (A) and (B)

Electromagnetic waves are produced by

• accelerated charged particle

• charge at rest

• charge in uniform motion

• acceleration particle

Electromagnetic waves are transverse in nature is evident by

• polarization

• interference

• reflection

• diffraction

Which rays are not the portion of electromagnetic spectrum

• X- rays

• Microwaves

• α –rays

• Radiowaves