Question

two Conducting wires of the same material and if equal length and equal diameter are first connected into series and then parrallel in a Circuit across the same potential difference.the ratio of the heat produced in series and parallel combination would be???? ​

Answer 1

Answer:

For series, H = V^2t/2R

For parallel, H = 2V^2t/R

Ratio = 1:4

Explanation:

In series,

Req = R1 + R2

      = 2R

By ohm's law, V = IR

           so,  V = I * 2R

                   I  = V/2R

H = VIt

  = V*V/2R*t

  = V^2*t/2R

In parallel,

Req = 1/1/R+1/R

      = 1/2/R

      = R/2

By ohm's law, V = IR

           so,  V = IR/2

                   I  = 2V/R

H = VIt

  = V*2V/R*t

  = 2V^2*t/R

Ratio = V^2t/2R/2V^2t/R

         = 1/4

         = 1:4

Answer 2

Answer:

Hope it helps you.......