Physics-
General
Easy

Question

In the following figure, the magnet is moved towards the coil with a speed v and induced e m f blank e. If magnet and coil recede away from one another each moving with speed v, the induced e m f in the coil will be

  1. e  
  2. 2 e  
  3. e divided by 2  
  4. 4 e  

The correct answer is: 2 e


    open parentheses fraction numerator d ϕ over denominator d t r end fraction close parentheses subscript I n blank f i r s t blank c a s e end subscript equals e
    open parentheses fraction numerator d ϕ over denominator d t end fraction close parentheses subscript r e l a t i v e blank v e l o c i t y blank 2 v end subscript equals 2 open parentheses fraction numerator d ϕ over denominator d t end fraction close parentheses subscript I blank c a s e end subscript equals 2 e

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