A solenoid of length 8cm has 500 turns /m in it. If radius of coil is 3cm and if it is carrying a current of 2A, find the magnetic induction at a point 4cm from the end on the axis of the solenoid

Explanation

To find the magnetic induction at a point 4 cm from the end of a solenoid, we can follow these steps:

### Step 1: Understand the parameters given
- Length of the solenoid (L) = 8 cm = 0.08 m
- Number of turns per meter (n) = 500 turns/m
- Radius of the solenoid (r) = 3 cm = 0.03 m
- Current (I) = 2 A
- Distance from the end of the solenoid to the point (d) = 4 cm = 0.04 m
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