Q1 Electromagnetic waves are transverse in nature is evident from
- Polarization
- Interference
- Reflection
- Diffraction
- Polarization
Q2 Which of the following are not electromagnetic waves
- Cosmic rays
- γ-rays
- 𝝱 rays
- X -rays
Q3 Which of the following radiations have least wavelength?
- γ-rays
- 𝞪-rays
- 𝛃-rays
- 𝘅-rays
- 𝝀-rays
Q4 Infrared radiations are detected by
- Spectrometer
- Pyrometer
- Nanometer
- Photometer
- Pyrometer
Q5 The electric and magnetic fields in an electromagnetic wave are
- in phase and perpendicular to each other
- in opposite phase and perpendicular to each other
- in phase and parallel to each other
- in opposite phase and parallel to each other
- in phase and perpendicular to each other
Q6 Which of the following are not electromagnetic waves?
- X-rays
- γ-rays
- Heat-rays
- 𝛃-rays
Q7 Which of the following radiations have least wavelength?
- X-rays
- γ-rays
- Ultra-violet rays
- Cosmic rays
- γ-rays
Q8 Decreasing order of wavelength of infrared, microwaves, ultraviolet and γ - rays is
- infrared, microwaves, ultraviolet, γ - rays
- infrared, microwaves, γ - rays ,ultraviolet,
- microwaves, infrared, ultraviolet, γ - rays
- ultraviolet, microwaves, infrared, ultraviolet, γ - rays
- microwaves, infrared, ultraviolet, γ - rays
Q9 According to Maxwell's hypothesis, a changing electric field gives rise to
- electric current
- magnetic field
- an e.m.f.
- pressure gradient
- magnetic field
Q10 Which of the following will deflect in electric field?
- X-rays
- γ- rays
- cathode rays
- ultraviolet rays
- cathode rays
