A storage battery of emf 8.0 V and internal resistance `0.5 Omega` is being charged by a 120V dc supply using a series resistor of `15.5Omega`. what in the terminal voltage of the battery during charging ? What is the purpose of having a series resistor in the charging circuit?

Explanation

To solve the problem step by step, we need to determine the terminal voltage of the battery while it is being charged. We will also discuss the purpose of the series resistor in the charging circuit.

### Step 1: Identify the given values
- EMF of the battery, \( E = 8.0 \, \text{V} \)
- Internal resistance of the battery, \( r = 0.5 \, \Omega \)
- Voltage of the DC supply, \( V_s = 120 \, \text{V} \)
- Series resistor, \( R = 15.5 \, \Omega \)

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