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The diagram above shows three resistors ...


The diagram above shows three resistors connected across a cell of e.m.f. 1.8 V and internal resistance r. Calculate :
The internal resistance r.

Text Solution

Verified by Experts

Total external resentence R = 1 + 4 = `5Omega`
`becauseE=I(R+r)`
`rArr1.8=0.3(5+r)`
`rArr1.8/0.3=5+rrArr6=5+r`
`thereforer=6-5=1Omega`
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