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• Topic:

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(a) How are electromagnetic waves produced? Explain.

(b) A plane electromagnetic wave is travelling through a medium along the $+ve$ Z- direction. Depict the electromagnetic wave showing the direction of the oscillating electric and magnetic fields.

3marks

Explanation:

(a) An oscillating charge produces an oscillating electric field in space,which produces an oscillating electric field and so on. thus, oscillating electric and magnetic fields generate each other, they propagate in space.                                                                                  $11}{2}$mark

[Alternatively,if a student writes

Electromagnetic waves areproduced by oscillating electric and magnetic fields/oscillating charges produce em waves. Award ]                                                                     1mark

$11}{2}$mark

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