Figure shows two parallel wires separated by a distance of 4.0 cm and carrying equal currents of 10A along opposite directions. Find the magnitude of the magnetic field B at the points `A_1, A_2, A_3 and A_4.`

Figure shows two long parallel straight wires distance 5cm apart carrying currents 4A and 10A in opposite directions. Find the position of a point where the resultant magnetic field due to current in two wires in zero.

Two long current carrying wires A and B separated by 20 cm are carrying currents of 10 A and 20 A respectively in the opposite directions. Find the magnitude and direction of magnitic field at a point 10 em from both the wires.

Two long straight horizontal parallel wires one above the other are separated by a distance '2a' . If the wires carry equal currents in opposite directions, the magnitude of the magnitude induction in the plane of the wires at a distance 'a' above the upper wire is

Two long parallel straight wires X and Y separated by a distance of 5 cm in air carry currents of 10A and 5A respectively in opposite directions. Calculate the magnitude and direction of the force on a 20 cm length of the wire Y.

There are two parallel current carrying wires X and Y as shown in figure. Find the magnitude and direction of the magnetic field at points, P, Q and R.

Two parallel wires carry equal currents of 10A along the same direction and are separated by a distance of 2.0 cm. Find the magnetic field at a point which is 2.0 cm away from each of these wires.

Two parallel wires carry equal currents of 10A along the same direction and are separated by a distance of 2.0 cm. Find the magnetic field at a point which is 2.0 cm away from each of these wires.

Two parallel wires carry equal currents of 10A along the same direction and are separated by a distance of 2.0 cm. Find the magnetic field at a point which is 2.0 cm away from each of these wires.

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