NCERT Exercise 3.8 - Current Electricity
Question: A storage battery of emf 8.0 V and internal resistance 0.5 Ω is being charged by a 120 V dc supply using a series resistor of 15.5 Ω. What is the terminal voltage of the battery during charging? What is the purpose of having a series resistor in the charging circuit?
Answer: Terminal voltage during charging = **11.5 V**. Series resistor **limits charging current** to prevent damage from excessive current.
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