Question

a 10v cell of negligible internal resistance is connected in parallel across a baterry of emf 200v and internal resistance 38 ohm.find the value of current.

Answer 1

Arrange of cells are shown in figure , plz see attachment .
Let i current passing through circuit .
use Kirchoff's law,
-10V + i × 38 - 200V = 0 [ ∵in closed loop sum of potential difference equal = 0]
38i - 190 = 0
⇒ 38i = 190
⇒ i = 190/38 = 5A

Hence, current passing through it is 5Amperes