4. Explain Ampere's law and magnetic field due to a solenoid?

Problem-4: Find the magnetic field due to current of 5 A through a solenoid of length of 0.45 m and having number of coils 5000?

5. Explain Faraday's laws of electromagnetic induction? What is Lenz's Law? Describe mutual and self-inductance?

Problem-5: Calculate energy stored in an inductor of 30 mH when a current of 12 A pass through?