Question

The network shown in the figure is a part of complete circuit. What is the potential difference `V_B-V_A` when the current `I` is `5 A` and is decreasing at a rate of `10^3A//s`?

A. `20 V`
B. `15 V`
C. `10 V`
D. `5 V`

Answer 1

Correct Answer - B
`V_(A)-IR+15-L(dI)/(dt)=V_(B)`
`V_(B)-V_(A)=-IR+15-L(dI)/(dt)`

`V_(B)-V_(A)=-5xx1+15-5xx10^(-3)xx(-10^(3))`
`V_(B)-V_(A)=15` Volt