Suppose we have a transformer which converts 220 V AC to 12 AC. In the transformer when we apply 220 V DC voltage then usually coil is burned. Why ?

Explanation

To understand why the coil of a transformer burns when 220 V DC is applied instead of 220 V AC, we can break down the explanation into several steps:

### Step-by-Step Solution:

1. **Understanding the Transformer Functionality**:
- A transformer operates on the principle of electromagnetic induction, where an alternating current (AC) in the primary coil generates a changing magnetic field that induces a voltage in the secondary coil.

2. **AC vs. DC Voltage**:
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