Question

A student has made connections, as shown in Figure below, so that the wires MN and ST repel each other. But it is observed that they are attracting each other. What change should the student make for the wires to repel each other?

Options

• Reverse the terminals of batteries E₁ and E₂.

• Reverse the terminals of battery E₁ or E₂.

• Choose supply voltage such that E₁ = E₂.

• Add key and ammeter to the circuit.

Answer 1

Reverse the terminals of battery E₁ or E₂.

Explanation:

For the wires MN and ST torepel each other, current should flow inopposite direction in the two wires.