Question

A battery of emf E drives a current of 0.25A when connected to 5.5ohm resistor. When the 5.5 ohm resistor is replaced with 2.5ohm resistor, the current flowing becomes 0.5A. Find the emf E and the internal resistance r of the battery

Answer 1

Answer:

r = 0.5 Ω

E = 1.5 V

Explanation:

MAKE TWO EQUATIONS USING FORMULA

E - I r = I R

Here,

r = internal resistance

R = external resistance