Two identical cells of emf 1.5 v each, connected in parallel, provide a supply to an external circuit consisting of two resistors of 7 each, joined in parallel. A very high resistance voltmeter reads the terminal voltage of the cells to be 1.4 v. What is the internal resistance of each cell?
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Answer:
0.25 ohm of each cell
Explanation:
we know V=E-ir I=E/R I=0.4 amper then
1.4=1.5-0.4r
r=0.25ohm
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