Physics-
General
Easy

Question

An e.m.f. of 5 blank v o l t is produced by a self inductance, when the current changes at a steady rate from 3 blank A to 2 blank A in 1 millisecond. The value of self inductance is

  1. Zero  
  2. 5 blank H  
  3. 5000 blank H  
  4. 5 blank m H  

The correct answer is: 5 blank m H


    L equals fraction numerator e over denominator d i divided by d t end fraction equals fraction numerator 5 over denominator left parenthesis 3 minus 2 right parenthesis divided by 10 to the power of negative 3 end exponent end fraction equals fraction numerator 5 over denominator 1 end fraction cross times 10 to the power of negative 3 end exponent equals 5 m i l l i blank h e n r y

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