Loop Current

Loop current is like a game of hot potato, but with electricity. Imagine you and your friends are passing a ball around in a circle. The ball represents electricity and the circle represents a phone line. When you pass the ball to your friend, they catch it and pass it to the next friend until it comes back to you. This is like how electricity flows in a phone line - it flows from one end to the other and back again.

However, sometimes things can get tricky when the ball doesn't get caught or someone accidentally drops it. The same thing can happen with loop current in a phone line. If there is a problem with the line, like something blocking the way or a break in the circuit, it can cause the loop current to stop flowing.

To fix this, engineers use special devices called repeaters to keep the loop current going. It's like adding a new friend to the circle to keep the ball moving even if someone drops it. The repeater boosts the signal and sends it back in the opposite direction, keeping the current flowing around the loop. Overall, loop current is important to make sure phone lines stay connected and information can be transmitted successfully.