Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Medium-Class 12
A plane electromagnetic wave travels in free space with an electric field E = 6.3 ˆ j V/m at a certain point. If the speed of light in free space is 3 × 10^8 m/s, what is the magnitude of the magnetic field B at this point?
A
1 × 10^-8 T
B
9 × 10^-8 T
C
5 × 10^-8 T
D
0 × 10^-8 T
Correct Answer
Option A
Detailed Explanation
Using the relation B = E/c, where c is the speed of light, we get B = 6.3 V/m / 3 × 10^8 m/s = 2.1 × 10^-8 T.
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