If no current were flowing, the north seeking end of the compass needle would point toward the earth’s magnetic pole. Whenc urrent flows, the needle lines itself up at right angles to a radius drawn from the conductor.
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 magnetic needle where does it always point?
The magnetic field is a zone where the force is active along imaginary lines. From the south magnetic pole to the north magnetic pole, this force has an effect on all magnetized objects, such as the needle of a compass. Under the effect of Earth’s magnetic field, the needle always points toward the north magnetic pole.
What happen to the compass needle when there is no electric current flow in the wire?
10.2 Magnetic field associated with a current (ESBPS) If you hold a compass near a wire through which current is flowing, the needle on the compass will be deflected.Note that if there is no current there will be no magnetic field.
Where does a compass needle point whenever it is at rest?
The earth acts like a huge magnet. Thus in the absence of electric current a compass needle always comes to rest in Earths North-south direction. However, when current passes through the circuit the needle comes to rests in the direction opposite to the magnetic field of Earth i.e. South-North direction.
What happens to the needle when the current is switched on?
As electric current is flowing through the wire then a magnetic field gets surrounded around the wire. Now, as the needle of the compass is also a type of magnet. Therefore, this magnetic needle and the magnetic field suffer attractions and repulsions and hence the needle gets deflected.
Why does a compass needle point 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 compass needle deflects when it is kept near an electric current?
Why does the needle of a magnetic compass deflect when it is kept beside a current carrying wire? A current carrying wire always produces a magnetic field around it and due to this magnetic field the needle of magnetic compass deflects.
Which direction will a magnetic needle show on the geographic North Pole?
Answer: Magnetic compass needle always points towards the magnetic north pole of the earth. When compass is at the earth’s geographical north pole ,it points towards the north pole.
Can a compass point south?
According to the United States Geological Survey, at very high latitudes , a compass needle can even point south. By using charts of declination or local calibrations, compass users can compensate for these differences and point themselves in the right direction.
In what direction would a compass needle point if it were free to point in all directions when located near Earth’s north magnetic pole in Canada?
If you mean the geographical North Pole, the needle would point south, as that is the only direction one can go from there; more specifically it would point south along the 112.4 degrees west longitude meridian towards the magnetic north pole at 82 degrees north, which is where compasses point.
How does the compass needle move when the compass is below the wire above the wire?
The compass needle moves towards the east, 90 degrees from where it was and in the opposite direction to when the compass was on top of the wire. So the magnetic field direction is different above and below the wire. This happens because there is actually a magnetic field created which goes around the wire.
What does the direction of the compass needle represent?
A compass needle points north because the north pole of the magnet inside it is attracted to the south pole of Earth’s built-in magnet.
How does a compass needle change direction when it is placed near a current carrying wire?
a)If the magnitude of current is increased ,then the deflection of the compass will increase as the electric field created by the wire in turn creates a magnetic field which deflects the compass needle.
What is the direction of magnetic needle always pointing answer?
A compass needle is a bar magnet with a pointed north pole. It is attracted to the magnetic south pole. Hence magnetic needle points in North Direction (Magnetic South).
Which direction do magnetic needles show?
north-south direction
When a compass is kept at a place, the magnetic needle aligns in a north-south direction. The red arrow of the compass needle is termed as the north pole and the other end as the south pole.
What happens to the compass when you change the direction of the electric current?
Explanation: The compass needle does not move as far from magnetic north. 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.
Why does the compass needle deflects when it is kept near a bar 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.
Do you notice any relation between the direction of current and position of the needle?
Do you notice any relation between the direction of current and position of the needle?The magnetic effect is observed because of the current in the wire. This means electricity and magnetism are closely related! Also, if a magnet is moved and kept moving, we will observe electric effect.
Why does magnet always point to north?
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 do compasses point north and not south?
Why do compasses point north and not south? A compass needle points north because the north pole of the magnet inside it is attracted to the south pole of Earth’s built-in magnet. … Since unlike poles attract, the thing your compass is being attracted to must be a magnetic south pole.
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