Two identical-looking iron bars A and B are given, one of which is definitely known to be magnetized. (We do not know which one). How would one ascertain whether or not both are magnetized ? If only one is magnetized, how does one ascertain which one ? [Use nothing else but the two bars A and B]

Explanation

To determine whether both iron bars A and B are magnetized, and to identify which one is magnetized if only one is, we can follow these steps:

### Step-by-Step Solution:

1. **Hold the Bars Together**: Take both bars A and B in your hands and hold them such that the ends of the bars are close to each other. Ensure that you are holding different ends of the bars.

2. **Check for Repulsion**: Bring the ends of the two bars close together. Observe if there is any repulsive force between them.
- If you feel a repulsive force, it indicates that both bars are magnetized. This is because like poles repel each other.
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