A light metal disc on the top of an electromagnet is thrown up as the current is switched on. Why? Give reason.

Explanation

To understand why a light metal disc is thrown up when the current is switched on in an electromagnet, we can break down the explanation into several steps:

### Step-by-Step Solution:

1. **Setup Description**:
- We have a light metal disc placed on top of an electromagnet. The electromagnet is capable of generating a magnetic field when an electric current passes through it.

2. **Current Activation**:
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