If primary winding of a transformer were connected to a battery , the current in it will :

Options

A. Increase
B. Remain constant
C. Decrease
D. First (1) then (3)

Answer

To solve the question regarding the behavior of the current in the primary winding of a transformer when connected to a battery, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Transformer**: A transformer consists of two coils: the primary and the secondary. The primary coil is connected to an external power source (in this case, a battery), while the secondary coil is where the output voltage is induced.

2. **Connection to a Battery**: When the primary winding of a transformer is connected to a battery, it receives a constant electromotive force (EMF) from the battery.

3. **Constant EMF**: Since the battery provides a constant voltage, the EMF applied across the primary coil remains constant.

4. **Resistance of the Coil**: The primary coil has a certain resistance, which is also constant.

5. **Applying Ohm's Law**: According to Ohm's Law, the current (I) flowing through a conductor is given by the formula:
\[ I = \frac{V}{R} \]
where \(V\) is the voltage (or EMF in this case) and \(R\) is the resistance.

6. **Current Calculation**: Since both the EMF (voltage) and the resistance of the primary coil are constant, the current in the primary coil can be calculated as:
\[ I = \frac{\text{Constant EMF}}{\text{Constant Resistance}} \]
This indicates that the current will also be constant.

7. **Conclusion**: Therefore, when the primary winding of a transformer is connected to a battery, the current in it will remain constant.

### Final Answer:
The current in the primary winding of a transformer connected to a battery will remain constant.

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