CBSE Class 12 Physics Electromagnetic Waves Quiz 1

MCQ Mojo

Quiz Guides

Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7 Class 8 Class 9 Class 10 Class 11 Class 12

Quiz Guides

CBSE

Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7 Class 8 Class 9 Class 10 Class 11 Class 12

Toggle dark mode

CBSE › Class 12 › Physics › Electromagnetic Waves

1/10

0:00

1. The dimensional formula of \(\vec{E}\) is:

A [MLT^-2A^-1] B [MLT^-3A^-1] C [MLT^-2A^-2] D None of these

2. The dimensional formula of is:

A [MLT^-2A^-1] B [ML⁰T^-2A^-1] C [ML⁰T^-3A^-1] D None of these

3. Which of the following has the dimensions of current?

A ε₀ \(\vec{E}\).\(\vec{dt}\) B µ₀ \(\vec{E}\).\(\vec{dt}\) C \(\frac{\vec{B}.\vec{dl}}{µ_0}\) D \(\frac{\vec{B}.\vec{dl}}{ε_0}\)

4. Which of the following has the dimensions of charge?

A \(\frac{ε_0\vec{E}}{\vec{ds}}\) B µ₀ [latex]\vec{E}\).\(\vec{ds}\) C \(\frac{ε_0}{µ_0}\) \(\vec{E}\).\(\vec{ds}\) D \(\frac{µ_0}{ε_0}\) \(\vec{E}\).\(\vec{ds}\)

5. Maxwell's equation involving \(\frac{d}{dt}\) \(\vec{B}\) is obtained-from:

A Ampere's law B Gauss's law C Faraday's law D Biot-Savart's law

6. The dimensions of \(\vec{E}\), \(\vec{dl}\) are identical to that of:

A potential B charge C current D None of these

7. Which of the following laws was modified by Maxwell by introducing the displacement current?

A Gauss's law B Ampere's law C Biot-Savart's law D None of these

8. Choose the wave relevant to telecommunication :

A ultraviolet B infrared C microwave D visible light

9. Electromagnetic waves have a speed of

A 3 × 10⁵ kms^-1 B 3 × 10⁶ kms^-1 C 3 × 10⁷ kms^-1 D 3 × 10⁸ kms^-1

10. Which of the following EMW has highest wavelength?

A X-ray B ultraviolet rays C infrared rays D microwaves

Practice more on Electromagnetic Waves

Quiz 1 Quiz 2 Quiz 3

MCQ Mojo

Free chapter-wise MCQ practice with instant answers and explanations for CBSE classes 6–12 — plus timed mock tests. Learn smarter, score higher.