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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
- What determines the nature of the path followed by the particle?
- The young’s modulus of steel is twice that of brass. Two wires of same length
- Water flows through a pipe. The area of cross-section at one place A₁=10 cm²,
- A mixture consists of two radioactive materials A₁ and A₂ with half lives of 20s
- Two conducting spheres of radii 5 cm and 10 cm are given a charge of 15 μC each.
Topics: Electromagnetic Waves (28)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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