# How does a current affect a compass?

## How does a current affect a compass?

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.

## What does a compass tell you about what is happening in the wires?

We use a compass to tell us relative direction of the charge. Charge flows through the wire. What happens in the wires when the battery connections are reversed?

What does the direction of the compass needle represent?

Compass needles point in the direction of the magnetic field lines, which is generally different from the direction to the Geographic North Pole. The black lines (meridians) indicate the direction of True North. The angle between the compass pointing direction and True North is called magnetic declination.

What happens to the deflection of the compass needle?

Observe the deflection in the compass needle as you move it along a field line. The deflection increases as the needle is moved towards the poles.

### What happens to the deflection of compass needle placed at a given point if the current in copper wire is changed?

What happens to the deflection of the compass needle placed at a given point if the current in the copper wire is changed? It indicates that the magnitude of the magnetic field produced at a given point increases as the current through the wire increases.

### What change in the deflection of the compass needle placed at a point near?

(a) Deflection increases when current through conductor increases.

What happens to the deflection of the compass needle placed at a point near current carrying straight conductor i if the current is increased?

Answer. if current in the wire is increase then the needle of the compass needle place at that get deflected by a large angle. the straight of magnetic field at a point due to this current carrying conductor is directly proportional to the current….

What will happen if take magnetic compass near a bar magnetic A The needle will deflect b the needle will not deflect C The needle will reverse the direction D none of these?

The needle will not deflect. c. The needle will reverse the direction.

## Why does the needle get deflected by the magnet?

The compass needle is a small magnet. That’s why when a compass needle is brought near a bar magnet, its magnetic field lines interact with that of the bar magnet. Hence, a compass needle gets deflected near the magnet bar.

## What happens when a compass is brought near a magnet?

If a compass is brought near a magnet its needle gets deflected due to the magnetic field of magnet. If a compass is brought near a magnet its needle gets deflected due to the magnetic field of magnet.

What are the 4 major properties of magnet?

They are:

• Attractive Property “ Magnet attracts ferromagnetic materials like iron, cobalt, and nickel.
• Repulsive Properties “ Like magnetic poles repel each other and unlike magnetic poles attract each other.
• Directive Property “ A freely suspended magnet always points in a north-south direction.

What will happen to the position of the needle if you bring a bar magnet near to magnetic compass?

Solution: If we bring a bar magnet near a magnetic compass N, its needle will get deflected. When we bring North pole of a bar magnet near the magnetic compass, its needle will be deflected away from the magnet as shown in Fig. (i).

### Why do magnets align themselves in the north-south direction?

Magnetism | Short/Long Answer Questions Solution: A freely suspended magnet always rests in the north-south direction because the magnetic south pole of the earth lies in the geographic north direction and the magnetic north pole of the earth lies in the geographical south direction.

### Why does a compass needle always point to the North?

Earth’s south magnetic pole is near Earth’s geographic north. Earth’s magnetic north pole is near Earth’s geographic south. That’s why the north pole of a compass points toward north because that’s where Earth’s south magnetic pole is located and they attract.

Why does the needle of compass always remain in the north-south direction?

Actually, the compass needle itself is a little magnet with two magnetic poles and the earth acts as a really big magnet due to the magnetic field created by its iron core. So the compass needle when allowed to spin whichever way it wants, will always line itself along the north-south direction.

Why does my compass needle point south?

Reverse polarity is where the magnetism in the compass needle becomes permanently reversed so the red end of the needle points south instead of north. This is different to the magnetic needle being temporarily deviated a little when near a metal object or weak magnet and correcting itself as soon as it is moved away.

## What happens to the direction of the compass needle if the direction of the current is reversed?

If the direction of the current is reversed, the compass needle will move in the opposite direction because the polarity of the magnetic field has reversed.

## What happen when a compass needle is brought near a wire in which current is flowing?

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.

What will happen to a compass needle when the compass is placed below a wire?

Complete step by step solution: Then our finger will wrap around the conductor in the direction of the field lines of the magnetic field is known as the right-hand thumb rule. Thus, when a magnetic compass is trough below in the current-carrying wire the compass needle shows deflection in the north-south direction.