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Electromagnetic Waves

AIPMT 2003MCQEasy📈 Topic in 25% papers+4−1
Ques. 1AIPMT 2003

Which of the following rays are not electromagnetic waves?

  1. X-rays
  2. -rays
  3. -rays
  4. heat rays

Answer

(3) -rays

Solution

X-rays, -rays and heat (infrared) rays are parts of the electromagnetic spectrum; they travel with speed c and carry no charge.

-rays are streams of fast-moving electrons (or positrons) emitted from nuclei, i.e. material particles carrying charge; they are deflected by electric and magnetic fields.

∴ -rays are not electromagnetic waves.

Answer: (3)

Keep practising — Electromagnetic Waves

Ques. 2AIPMT 2002

The velocity of electromagnetic wave is parallel to

  1. B E
  2. E B
  3. E
  4. B
Ques. 3AIPMT 2002

What is the cause of greenhouse effect?

  1. infra-red rays
  2. ultra violet rays
  3. X-rays
  4. radio waves.
Ques. 4AIPMT 2001

Biological importance of ozone layer is

  1. it stops ultraviolet rays
  2. ozone layer reduces greenhouse effect
  3. ozone layer reflects radio waves
  4. ozone layer controls O2/H2 ratio in atmosphere
Ques. 5AIPMT 2000

The frequency order for -rays (a), X-rays (b), UV rays (c) is

  1. b > a > c
  2. a > b > c
  3. c > b > a
  4. a > c > b

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