A closely wound solenoid `80cm` long has layers of windings of `400` turns each. The diameter of the solenoid is `1*8cm`. If the current carried is `8*0A` estimate the magnitude of `vecB` inside the solenoid near its center.

Explanation

To find the magnitude of the magnetic field \( \vec{B} \) inside a solenoid near its center, we can use the formula for the magnetic field inside a solenoid:

\[ B = \mu_0 n I \]

where:
- \( B \) is the magnetic field,
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