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The magnetic field of a plane electromagnetic wave is given by : → B = B 0 i ˆ [cos (kz – ω t)] + B 1 j ˆ cos (kz + ω t) Where B 0 = 3 × 10 –5 T and B 1 = 2 × 10 –6 T. The rms value of the force experienced by a stationary charge Q = 10 –4 C at z = 0 is closest to -

1. 0.6 N
2. 3 × 10 –2 N
3. 0.9 N
4. 0. 1N

Correct answer: 0.6 N

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