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Nuclear sizes are expressed in a unit named

  • Fermi
  • Angstrom
  • Newton
  • Tesla

Answer: Option A

Similar Questions :

1. The angle of reflection is equal to the angle of incidence.

  • True
  • False

Answer: Option A

2. What is unit of Astronomical distance ?

  • light year
  • angstrom
  • weber
  • lux

Answer: Option A

Explanation:

angstrom is used to measure wave length,

weber is used to measure Magnetic flux,

lux is used to measure Intensity of illumination.

3. Scalar Quantities are

  • physical quantities which have magnitude only and no direction
  • physical quantities which have no magnitude only and only direction
  • physical quantities which have magnitude only and direction
  • physical quantities which have no magnitude and no direction

Answer: Option A

4. Which of following in not a property of cathode ray.

  • Cathode rays are invisible and travel in a straight line.
  • These rays can ionise gases.
  • These rays can penetrate through thin metal foils.
  • These rays make materials cool on which they fall.

Answer: Option D

Explanation:

These rays heat the materials on which they fall.

5. Device used to measure potential difference between two points in a circuit is ?

  • Ammeter
  • Galvanometer
  • Voltmeter
  • None of above

Answer: Option C

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