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NTA Abhyas JEE Main2020PhysicsUnits and DimensionsPractice

If E and B denote electric and magnetic fields respectively, which of the following is dimensionless?

Options

  1. Aμ 0 ε 0 E B
  2. Bμ 0 ε 0 E B
  3. Cμ 0 ε 0 B E 2
  4. Dμ 0 E B ε 0

Correct answer

A. μ 0 ε 0 E B

Step-by-step solution

E B = c (Velocity of light if we consider free space) and 1 μ 0 ε 0 = c So μ 0 ε 0 E B is dimensionless.

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