n identical cells each of emf `epsilon` and lnternal resistance r are connected in parallel with resistor R. The current nowing through resistor R is ..........

Options

A. `(n epsilon)/(R + nr)`
B. `(n epsilon)/(n R + r) `
C. `(epsilon)/(R + r)`
D. `(epsilon)/(nR + r)`

Answer

B

Explanation

`(n epsilon)/(n R + r) `
Total resistance of circuit = R + `(r)/(n) `
Current I = `(epsilon)/(R + (r)/(n)) = (n epsilon)/(nR + r)`