filter
  • Subject:

    ...

  • Topic:

    ...

(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.                                                                                  112mark

[Alternatively,if a student writes 

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

                                    112mark

BOARD