Free Body Diagram

Concept: For equilibrium:

Step 1: Rearrange equation.


Step 2: After removing .
Net force:

Step 3: Acceleration.

Step 1: Formula for self-inductance.
The self-inductance of a coil is given by the formula: where:
- is the number of turns,
- is the magnetic flux,
- is the current.

Step 2: Substitute the given values.
We are given: Substitute these values into the formula: