Explain why two parallel wires carrying currents in opposite directions repel each other.

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.

Can two streamlins cross each other?

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