The direction of magnetic field lines is defined to be the
direction in which the north end of a compass needle points
. The magnetic field is traditionally called the B-field. Visualizing Magnetic Field Lines: Magnetic field lines are defined to have the direction that a small compass points when placed at a location.
How do we know the direction of the magnetic field?
Detecting magnetic fields
A magnetic field is invisible, but it can be detected using
a magnetic compass
. A compass contains a small bar magnet on a pivot so that it can rotate. The compass needle points in the direction of the Earth’s magnetic field, or the magnetic field of a magnet.
What is the direction of magnetic field Class 10?
The direction of magnetic field is taken to be the
direction in which a north pole of
compass needle move inside it. Magnetic field lines emerges from North pole and enter the magnet at south pole. Inside the magnet direction of field line is from south pole to north pole.
What is the direction of the magnetic field vector?
These vectors are all
perpendicular to each other
. 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.
What is meant by magnetic field Class 6?
Magnetic Field is the
region around a magnetic material or a moving electric charge within which the force of magnetism acts
.
What happens above Curie temperature?
Below the Curie temperature, the atoms are aligned and parallel, causing spontaneous magnetism; the material is ferromagnetic. Above the Curie temperature the material is
paramagnetic
, as the atoms lose their ordered magnetic moments when the material undergoes a phase transition.
Where is a magnetic field strongest?
The magnetic field is strongest at
the poles
, where the field lines are most concentrated. Field lines also show what happens to the magnetic fields of two magnets during attraction or repulsion.
What is the direction of force?
The direction of the force is
in the direction opposite the object’s direction of motion
. When the interaction ceases, the two objects no longer experience the force. The direction of the force is perpendicular to the direction the object moves. Forces only exist as a result of an interaction.
Does a compass use an electromagnet?
A compass
allows us to observe the direction of a magnetic field
: compass needles are just little magnets that are free to rotate. Normally, compasses respond to Earth’s magnetic field, orienting themselves parallel to magnetic field lines.
How magnetic field is created?
Conversely, a magnetic field is
produced by an electric charge in motion
. This is in accordance with Faraday’s Law of Induction, which is the basis for electromagnets, electric motors and generators. A charge moving in a straight line, as through a straight wire, generates a magnetic field that spirals around the wire.
How do you know the direction of current in a wire?
Using the right hand rule for the conventional current in the wire,
the right thumb is pointed along the wire pointing to the left
. At point the fingers curl around and point up, out of the screen. This can be verified by putting the thumb in the direction of current anywhere in the circuit.
Why can’t magnetic field lines cross?
The magnetic field lines never intersect each other because if two or more lines intersect each other than it means that
at that point of intersection, the magnetic field has two directions at the same point
. This is not possible for a magnetic field to point in more than one direction at the same point.
What do you mean by magnetic field?
:
the portion of space near a magnetic body or a current-carrying body in which the magnetic forces due to the body or current can be detected
.
What are the 4 properties of magnets?
- Magnets will attract ferromagnetic substances.
- Like poles of the magnet repel each other and unlike poles attract each other.
- A suspended magnet always comes to rest in the north-south direction.
- The poles of the magnet are in pairs.
What is a magnetic field Class 7?
(c) Magnetic field is defined as
the region around a magnet where the magnetic force can be experience by an object
. … Magnetic field lines emanate from the North Pole and terminate at the South Pole of a magnet (outside the magnet).
What is Neel point?
Néel point in British English
or Néel temperature (neɪˈɛl )
the temperature above which an antiferromagnetic substance loses its antiferromagnetism and becomes paramagnetic
. Collins English Dictionary.
