A copper wire of resistance `0.02 Omega//m` is used to construct a 1 m long solenoid of 500 turns and radius 1 cm. A battery of emf 1 V is connected across the solenoid. Find the magnetic field near the centre of the solenoid.

Explanation

To find the magnetic field near the center of the solenoid, we can follow these steps:

### Step 1: Calculate the length of wire used in the solenoid
The total length of the wire used to construct the solenoid can be calculated using the formula:
\[ \text{Total Length} = n \times 2\pi r \]
where:
- \( n = 500 \) (total number of turns)
- \( r = 1 \text{ cm} = 0.01 \text{ m} \) (radius of the solenoid)
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