A battery of voltage 12 V sends a current of 400 mA to an appliance. After a long continuous use, the current drops to 320 mA and the appliance does not operate. Find :
the terminal voltage of the battery when the appliance stops operating,

Explanation

To solve the problem, we need to find the terminal voltage of the battery when the appliance stops operating. Here are the steps to arrive at the solution:

### Step-by-Step Solution:

1. **Identify Given Values:**
- Initial voltage of the battery (V) = 12 V
- Initial current (I) = 400 mA = 0.4 A
- Current after a long use (I1) = 320 mA = 0.32 A
...