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Why does a needle of a compass move when you put a bar of metal close to it?
Wiki User
∙ 16y ago
The compass needle is a magnet and as you have probably tried, a magnet will 'stick' to an Iron bar.
Thus as you move the compass near the Iron, its magnetic field lines are bent by the Iron and become locally stronger than the field lines of the planet, deflecting the needle away from north.
Wiki User
∙ 16y ago
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What is the thing that helps the needle move freely in a compass called?
From an Engineering standpoint, it is called a BEARING. In a cheap compass it is a simple PINPOINT in the Base, and a CUP on the bottom of the Needle.
Which describes how a compass works?
. The south magnetic pole of the compass points to Earth's north magnetic pole.
In the first crude compass why was the needle floated in water?
Low friction so that weak magnet could move freely.
Why does a compass needle move when placed near a wire carrying an electric current?
True... The wire carring current creates a slight magnetic field.
Which test can best detect the presence of electrical current a the needle of a compass b the bulb in an electric circuit blows c the plug of an iron is placed in the socket?
Here are some possible answers: a) If you hold a compass close to a wire you may see the needle move. How much it moves depends on the strength of the current flowing in the wire. If the needle doesn't move then there may be three explanations: 1) No direct current was flowing in the wire OR 2) a direct current was flowing but it was too weak to make the compass needle move OR 3) there might have been a current but it was an alternating current changing so fast that the needle did not seem to move. b) If the bulb in an electric circuit was lit but then blows, it may mean one of two things 1) the current was switched off so the bulb went out OR 2) the bulb just died, in which case any current that was flowing in the bulb's circuit would stop. c) when the plug of an iron is placed into a socket, if it warms up then a current must be flowing from the socket to the iron. But before the iron was plugged-in, no current was flowing. Now you work out which of those answers to this question is the right one!
When a flows in a wire a compass needle near the wire will move?
The wire will move due to magnetic forces got from the compass needle since its a good conductor of electricity.
What is the thing that helps the needle move freely in a compass called?
From an Engineering standpoint, it is called a BEARING. In a cheap compass it is a simple PINPOINT in the Base, and a CUP on the bottom of the Needle.
Why does the needle on a compass move when placed in the coil of wire?
It moves because it wants to have compass babies with raccoons and so it won't get high it move and that is it giving birth
Compass needle move when a current switched on?
this is because of magnetic field formed when the current flows through it. this is called electromagnetism. if we move the compass needle away from current carrying conductor or wire it returns to its position (north south position)
Which describes how a compass works?
. The south magnetic pole of the compass points to Earth's north magnetic pole.
What is the circuit's total resistance?
You take the wire(s) that are in the circuit and place it on on a compass. Hold the compass still and the needle in the compass will move. However far that the needle is turned will detrmine how much resistance is in the circuit. (You know you have done this correctly if the needle in the compass spins counter clockwise.) Hope this helps you out :)
Why can't visible light move a compass needle?
because light does not have any magnetic push/pull
How does a compass needle move when it is placed in a magnetic field?
A compass needle aligns itself with the magnetic field lines and points toward the magnetic north pole. The north-seeking end of the needle is attracted to the Earth's magnetic south pole, causing it to move and orient itself accordingly.
Which country did a man spot a compass needle move?
The country was Denmark - the physicist in question was Hans Christian Oersted
How did Oersted discover the relationship between an electricity and magnetism?
He used an electric current to affect the needle of a compass.
In the first crude compass why was the needle floated in water?
Low friction so that weak magnet could move freely.
Explain why a compass points in a north-south direction?
a compass is a free-spinning magnet. When it interacts with the magnetic field lines of the earth, if the compass is not parellel to the field lines, it will spin. Just like a weather vane will move if it isn't parallel to the wind, the magnet will experience a force from the field lines causing the needle to move. When the needle is aligned with the field lines, it has reached an equilibrium since a deflection either to the east or west will experience a force pushing the northern half of the needle to north. So, essentially think of the magnetic field lines as a north-south wind and the magnet as a weather vane.
