The EMF of a cell is 10 V and its internal resistance is 2 ohm. The cell is connected to a resistor of 8 ohm. Calculate the amount of heat in Joule that will be produced in the resistor in 60 seconds.
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Answer: The total resistance of a circuit connected to the given cell of emf 15 V is the sum of all the resistances from various sources like, resistors, ammeter, voltmeter, etc., connected in series along with the internal resistance of the cell. ... Therefore, V=15V−(1.25×3)=11.25V.
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