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Dual Nature of Radiation and Matter · Question 77

AIPMT 2002MCQEasy📈 Topic in 0% papers+4−1
1

Which of the following is not the property of cathode rays?

  1. It produces heating effect
  2. It does not deflect in electric field
  3. It casts shadow
  4. It produces fluorescence.

Answer

(2) It does not deflect in electric field

Solution

As per NCERT, cathode rays are streams of fast-moving negatively charged particles (electrons).

⇒ They travel in straight lines and cast shadows of objects placed in their path.

⇒ They produce fluorescence on glass / zinc sulphide and heat the target they strike.

∵ They are charged, they are deflected by electric and magnetic fields.

∴ "It does not deflect in electric field" is not a property of cathode rays.

Answer: (2)

AIPMT 2002

Keep practising — Dual Nature of Radiation and Matter

2

Which one among the following shows particle nature of light?

  1. photoelectric effect
  2. interference
  3. refraction
  4. polarization
AIPMT 2001
3

A photo-cell is illuminated by a source of light, which is placed at a distance d from the cell. If the distance becomes d/2, then number of electrons emitted per second, will be

  1. remain same
  2. four times
  3. two times
  4. one-fourth
AIPMT 2001
4

The interplanar distance in a crystal is 2.8 10-8 m. The value of maximum wavelength which can be diffracted is

  1. 2.8 10-8 m
  2. 5.6 10-8 m
  3. 1.4 10-8 m
  4. 7.6 10-8 m
AIPMT 2001
5

By photoelectric effect, Einstein proved

  1. E = h
  2. K.E. = 12 mv2
  3. E = mc2
  4. E = -Rhcn2
AIPMT 2000
6

Who evaluated the mass of electron indirectly with help of charge

  1. Thomson
  2. Millikan
  3. Rutherford
  4. Newton
AIPMT 2000

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