Physics
A cell is used to send current to an external circuit. (a) How does the voltage across it's terminals compare with it's e.m.f. ? (b) Under what condition is the e.m.f. of the cell equal to it's terminal voltage?
Current Electricity
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Answer
(a) When a cell is used to send current to an external circuit, it's terminal voltage V is less than it's e.m.f.
Hence, terminal voltage < e.m.f.
(b) The emf of the cell is equal to it's terminal voltage when no current is drawn.
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