Calculate the magnetic field at a point 0.1 m from a long straight wire carrying a current of 5 A. Take μ₀ = 4π × 10⁻⁷ T m A⁻¹.

A circular coil of 100 turns and radius 0.1 m carries a current of 2 A. Find the magnetic field at its centre. Take μ₀ = 4π × 10⁻⁷ T m A⁻¹.

How is a galvanometer converted into an ammeter and into a voltmeter?

State the Biot-Savart law and Ampere's circuital law.

Distinguish between diamagnetic, paramagnetic and ferromagnetic substances, with one example of each.

State Kirchhoff's two laws and say what conservation principle each expresses.

Two capacitors of 2 μF each are joined in series and then in parallel. Find the equivalent capacitance in each case.