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A plane electromagnetic wave of frequency 20 MHz travels through a space along x-direction. If the electric field vector at a certain point in space is 6 Vm⁻¹, then what is the magnetic field vector at that point?
Options
(a) 2×10⁻⁸ T
(b) (1/2) x 10⁻⁸ T
(c) 2 T
(d) (1/2) T
Correct Answer:
2×10⁻⁸ T
Explanation:
The magnetic field, B = E / c, where c = 3 × 10⁸ ms⁻¹
B = 6 / 3 × 10⁸ = 2 × 10⁻⁸ T
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Topics: Electromagnetic Waves
(28)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A uniform wire of resistance 9Ω is joined end-to-end to form a circle. Then
- A solid sylinder of mass 3 kg is rolling on a horizontal surface with velocity 4 ms⁻¹
- A particle is dropped vertically from rest, from a height.The time taken by it to fall
- An atom bomb weighing 1 kg explodes releasing 9×10¹³ J of energy.
- The resultant of two forces, one double the other in magnitude, is perpendicular
Topics: Electromagnetic Waves (28)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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