# What happens if you put a compass near an electrical current?

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If you hold a compass near a wire through which current is flowing, the needle on the compass will be deflected. Since compasses work by pointing along magnetic field lines, this means that there must be a magnetic field near the wire through which the current is flowing.

## How does electric current affect a compass?

Every electric current produces magnetism. … Since the compass needle is also a magnet, the magnetic field around the wire attracted and repelled the ends of the compass magnet and caused it to move. You have seen that electricity flowing through a wire can cause a magnet to move. This is called the motor effect.

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## What happens if you place a compass near a current carrying wire?

A current carrying wire behaves like a magnet and affects other magnets in its magnetic field. As a result, the needle in the compass gets deflected when we place a compass near a current conducting wire.

## How would the compass respond when you turn on the current?

When you put the compass near the electrical wire with current flowing through it, the compass did not point north; instead, the compass needle pointed in the direction of the current’s magnetic field.

## Does the compass affect the electrical activity in the wires?

A: The compass needle moves from magnetic north to a position perpendicular to the wire. This investigation shows that the compass needle is affected by the electricity moving through the circuit.

## Does electric current get used up as it goes around the circuit?

An electric current in a circuit transfers energy from the battery to the circuit components. No current is ‘used up’ in this process. In most circuits, the moving charged particles are negatively charged electrons that are always present in the wires and other components of the circuit.

## Does current affect compass needle?

When a current runs through the wire, the compass needle is deflected, illustrating the magnetic effects of current flowing in a wire. … No deflection is observed if the compass needle is placed near to and at right angles to the current carrying wire.

## What happens to a magnetic compass needle when it is brought near a wire through which current flows?

The needle of a magnetic compass starts deflecting when it is kept nearby a wire through which electric current is flowing. Therefore, this magnetic needle and the magnetic field suffer attractions and repulsions and hence the needle gets deflected.

## Why does a compass needle placed near a current carrying wire shows deflection?

A current carrying wire always produces a magnetic field around it and due to this magnetic field the needle of magnetic compass deflects.

## In which direction will the compass needle point if it is held above the wire?

A compass needle placed above the wire points with its north pole toward the east.

## Can you use a compass to detect the currents in wires in the walls near light switches in your home?

(19) Can you use a compass to detect the currents in wires in the walls near the light switches in home? A compass does not detect currents in wires near light switches because… 1. The cable to the light switch contains two wires – one carrying current to the switch and one carrying current away from the switch.

## What will happen to a compass needle when a compass is placed below a wire and a current is made to flow through the wire?

The compass needle will show deflection. This happens because when a current is passed through a conductor (here, wire) a magnetic field is produced around the conductor due to which the compass needle gets deflected.

## What happens to the compass needle when the circuit is off?

Electric Current and its Effects | Exercise

This circuit does not have a source of current like a battery in it. In the absence of current, the wire does not behave like a magnet and hence, the compass needle will not show any deflection.

## What is the role of compass in a circuit?

Point out to students that because the compass needle is deflected in the presence of an electromagnetic field, it is a useful tool for detecting the presence of current in a wire. When students held the circuit so that the negative terminal of the battery was up, the wire had a certain polarity.

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