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The magnetic field of a plane electromagnetic wave is given by B r = 2 × 10 –8 sin(0.5 × 10 3 x + 1.5 × 10 11 t) j ˆ T The amplitude of the electric field would be

1. 6 Vm –1 along x-axis
2. 3 Vm –1 along z-axis
3. 6 Vm –1 along z-axis
4. 2 × 10 –8 Vm –1 along z-axis

Correct answer: 6 Vm –1 along z-axis

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