A transformer has 100 turns in the primary and 500 turns in the secondary. If the primary is connected to 220V DC supply, then the voltage develop across the secondary will be

Options

A. A. 2200 V
B. B. 1100 V
C. C. zero
D. D. 44 V

Explanation

To solve the problem, we need to analyze the operation of a transformer and the nature of the voltage supply provided.

### Step-by-Step Solution:

1. **Understanding the Transformer**: A transformer consists of two coils, the primary and the secondary, wound around a magnetic core. The primary coil is connected to an AC voltage source, while the secondary coil provides the transformed voltage.

2. **Given Data**:
- Number of turns in the primary coil (N1) = 100 turns
- Number of turns in the secondary coil (N2) = 500 turns
- Voltage applied to the primary (V1) = 220 V DC

3. **Transformers and AC Supply**: Transformers operate on the principle of electromagnetic induction, which requires a changing magnetic field to induce voltage in the secondary coil. This changing magnetic field is produced by an alternating current (AC) supply.

4. **DC Supply Characteristics**: A direct current (DC) supply, such as the 220 V DC mentioned, does not change over time; it remains constant. Therefore, it does not create a changing magnetic field.

5. **Conclusion on Voltage Induction**: Since the primary coil connected to a DC supply does not produce a changing magnetic field, no electromotive force (EMF) will be induced in the secondary coil. As a result, the voltage across the secondary coil will be zero.

6. **Final Answer**: The voltage developed across the secondary will be **0 V**.