The voltage across the terminals of a 9.0 V battery is 8.1 V when the battery...

Question

Question

The voltage across the terminals of a

9.0 V battery is 8.1 V when the battery is connected to a 40 Ω load.

What is the battery's internal resistance?

Answer 1

Answer #1

APPLY THE formula from ohms law in simple ckt

initlal current i = V/R = 8.1/40 = 0.2025 Amps

as V - E = i (R+r)

r = (9-8.1)/0.2025

r = 4.45 ohms

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Answer 2

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