Question

Find the total heat produced in the loop of the previous problem during the interval 0 to 30 s if the resistance of the loop is `4.5 Omega`.
A. `2.5xx10^(4)J`
B. `2.0xx10^(4)J`
C. `3.0xx10^(4)J`
D. `3.5xx10^(4)J`

Answer 1

Correct Answer - B
The current exists in the loop for time-interval `t=0` to `t=5s` and `t=20` to `t=25s` i.e., for time `t=10sec`
`H=(e^(2))/(R)t=(3xx10^(-4))xx10/(4.5xx10^(-3))=2xx10^(-4)J`