Keeping the potential difference constant , the resistance of a circuit is halved.  By how much does the current change? 

Asked by pdcavita | 26th Nov, 2017, 09:01: PM

Expert Answer:

 
Current will be doubled
 
straight V equals straight I subscript 1 xR subscript 1 space space

straight V equals straight I subscript 2 xR subscript 2 space
straight I subscript 1 xR subscript 1 space equals straight I subscript 2 xR subscript 2 space equals straight I subscript 2 straight x straight R subscript 1 over 2

straight I subscript 2 equals fraction numerator straight I subscript 1 xR subscript 1 over denominator straight R subscript 1 over 2 end fraction space equals space 2 straight x space straight I subscript 1

Answered by Gajendra | 27th Nov, 2017, 11:33: AM