Class 11

26. Electromagnetic Waves question bank (Physics)

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Q1.

The amplitude of the magnetic field of a harmonic electromagnetic wave in vacuum is \( B_0 = 510 \,\text{nT} \). What is the amplitude of the electric field?

(A)
140 N C\(^{-1}\)
(B)
153 N C\(^{-1}\)
(C)
163 N C\(^{-1}\)
(D)
133 N C\(^{-1}\)
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Q2.

A free electron is placed in the path of a plane electromagnetic wave. The electron will start moving

(A)
along the electric field
(B)
along the magnetic field
(C)
along the direction of propagation of wave
(D)
in a plane containing the magnetic field and the direction of propagation
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