- What is the direction of magnetic field lines inside and outside the magnet?
- What is the magnetic field inside a magnet?
- What is the direction of magnet?
- Why are magnetic field lines closed curves?
- What is the SI unit of magnetic field strength?
- Is electromagnet a permanent magnet?
- How magnetic field is created?
- What constitutes the field of a magnet?
- What is electromagnet definition?
- What happens when you put a magnet near a compass?
- Why does bar magnet always point in north south direction?
- Where is the weakest area of magnetism on a magnet?
- Where is a magnetic field strongest?
- How is the direction of magnetic field lines determined?
What is the direction of magnetic field lines inside and outside the magnet?
It’s a convention that magnetic field lines are drawn from north to south.
Because we have defined the magnetic field lines to show the direction of the magnetic force on a north pole.
Hence, they are defined as north to south.
P.S.: The field lines don’t “repel” from north pole or “attract” to south pole..
What is the magnetic field inside a magnet?
Simply speaking a magnetic field is the region around a magnet. Magnets are made out of mineral called magnetide (or lodestone) which has the property of attracting iron. Scientists use magnetic field lines to represent these magnetic fields. The magnetic field lines of a simple magnet are shown in the picture below.
What is the direction of magnet?
Lines of Force from a Bar Magnets Magnetic Field The general direction for the magnetic flux flow is from the North ( N ) to the South ( S ) pole. In addition, these magnetic lines form closed loops that leave at the north pole of the magnet and enter at the south pole. Magnetic poles are always in pairs.
Why are magnetic field lines closed curves?
Magnetic field lines are closed curves because there is no such thing as a magnetic monopole.
What is the SI unit of magnetic field strength?
Magnetic field strength, also called magnetic intensity or magnetic field intensity, the part of the magnetic field in a material that arises from an external current and is not intrinsic to the material itself. It is expressed as the vector H and is measured in units of amperes per metre.
Is electromagnet a permanent magnet?
The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.
How magnetic field is created?
Magnetic fields are produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin.
What constitutes the field of a magnet?
A magnetic field is an area up to which the magnetic attraction or magnetic force can be exerted. The magnetic fields are constituted of point charges called electrons which are moving constantly in concentric circles around a conductor.
What is electromagnet definition?
A device consisting of a coil of insulated wire wrapped around an iron core that becomes magnetized when an electric current flows through the wire. Electromagnets are used to convert electrical control signals into mechanical movements.
What happens when you put a magnet near a compass?
Any magnet placed close enough to a compass will be able to alter the direction of the compass. In fact, as you move the magnet around the compass, its needle will no longer point at the North magnetic pole, but it will follow your magnet.
Why does bar magnet always point in north south direction?
When it comes to magnets, opposites attract. This fact means that the north end of a magnet in a compass is attracted to the south magnetic pole, which lies close to the geographic north pole. Magnetic field lines outside of a permanent magnet always run from the north magnetic pole to the south magnetic pole.
Where is the weakest area of magnetism on a magnet?
The magnetic field of a bar magnet is strongest at either pole of the magnet. It is equally strong at the north pole when compared with the south pole. The force is weaker in the middle of the magnet and halfway between the pole and the center.
Where is a magnetic field strongest?
The magnetic field is strongest at the center and weakest between the two poles just outside the bar magnet. The magnetic field lines are densest at the center and least dense between the two poles just outside the bar magnet.
How is the direction of magnetic field lines determined?
Key Points The right hand rule states that, to find the direction of the magnetic force on a positive moving charge, the thumb of the right hand point in the direction of v, the fingers in the direction of B, and the force (F) is directed perpendicular to the right hand palm.