The electric field of an electromagnetic wave in free space is given by $ \mathbf{E} = 10 \cos(10^7 t + kx) \hat{j} $ V/m, where $ t $ and $ x $ are in seconds and metres respectively. It can be

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The electric field of an electromagnetic wave in free space is given by $ \mathbf{E} = 10 \cos(10^7 t + kx) \hat{j} $ V/m, where $ t $ and $ x $ are in seconds and metres respectively. It can be inferred that

Accepted Answer

The wave is propagating along +x direction

Answer

The wavelength $ \lambda $ is 188.4 m

Answer

The wave number $ k $ is 0.33 rad/m

Answer

The wave amplitude is 10 $ \frac{V}{m} $

AIPMT MAINS 2010 Physics Wave Properties MCQ Question

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