Two straight parallel wires, each 20 cm long are separated by 10 cm. They carry 20 amp and 30 amp of current respectively. Calculate the force between them.

Two straight parallel wires A and B, cach 20 cm long are separated by 10 cm. They carry 20 A and 30 A current respectively in opposite directions. Calculate the magnetic field (i) the mid point

Two straight parallel wires A and B, cach 20 cm long are separated by 10 cm. They carry 20 A and 30 A current respectively in opposite directions. Calculate the magnetic field at (ii) the point 5 cm from A and 15 cm from B on the line joining them.

Find the force between two straight parallel wires, each of length one metre and cach carrying a current of 100 amperes when separated by a distance of one metre (given mu_0 = 4pi x 10^-7 N/m) .

Two plates of a parallel plate capacitor have an area of 100 cm^2 each and are separated by 2.5 mm. The capacitor is charged to 200V. Calculate the energy stored in the capacitor.

If the distance between two parallel current carrying wire is doubled. What is the force between them?

ABCD is a square of side 20 cm positive charges of +2 * 10^-9 C. +4 * 10^-9 C and + 8 * 10^-9 C are placed at the corners A, B and C respectively. Calculate the work required to be done to transfer a unit positive charge from D to the point of intersection of the diagonals.

Two straight wires A and B of lengths 10 m cach carrying currents of 4.0 A and 6.0 A in opposite directions lic parallel to each other at a distance of 2 cm. Estimate the force on a 10 cm section of the wire B near its centre.