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CBSE Class 12-science Answered

a car battery of 12V as a current 7.5 a when 1.2 oh m load is applied find the internal resistance of the battery
Asked by heymindurownbusiness | 04 May, 2024, 11:15: AM
answered-by-expert Expert Answer

Let E = 12 V is the EMF of battery  with internal resistance r and I = 7.5 A is the current drawn from battery

when a load resistance R = 1.2 Ω is connected.

Then we have , E = I ( R + r )

R+r = E / I

R+r = 12/7.5 Ω = 1.6 Ω

Hence , internal resistance r = ( 1.6 - 1.2 ) Ω = 0.4 Ω

Answered by Thiyagarajan K | 04 May, 2024, 01:15: PM

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