Lines of force always form individual CLOSED LOOPS around the magnet. Lines of force have a definite DIRECTION from North to South . Lines of force that are close together indicate a STRONG magnetic field.
What is the direction of magnetic lines?
The lines are directed from north pole to the south pole outside the magnet while they are directed from south pole to north pole inside the magnet. A tangent drawn on a magnetic field line gives the direction of the magnetic field at that point. The direction can also be determined by using a magnetic compass.
What is the direction of magnetic lines of force in a bar magnet?
The direction of magnetic lines of force of a bar magnet is from north to south pole outside the magnet and from south pole to north pole inside the magnet .
Do magnetic lines of force have direction?
Magnetic field lines are defined to have the direction that a small compass points when placed at a location . (a) If small compasses are used to map the magnetic field around a bar magnet, they will point in the directions shown: away from the north pole of the magnet, toward the south pole of the magnet.
Which direction do the lines run in a field diagram?
Field line patterns show the direction and shape of a magnetic field. These diagrams are made using a plotting compass . In diagrams of a magnetic field the arrows on the lines show the direction from the north to the south poles . A magnetic field is also created when an electric current moves through a coil of wire.
What is Fleming’s left hand rule?
Fleming’s left – hand rule states that if we stretch the thumb, middle finger and the index finger of the left hand in such a way that they make an angle of 90 degrees(Perpendicular to each other) and the conductor placed in the magnetic field experiences Magnetic force.
Which refers to the ends of a magnet where the forces are strongest?
The area of the magnetic field where the magnet’s power is the strongest is called the magnetic poles . If a magnet is hung so that it is free to turn, it will turn in the north-south direction. The end that faces the north is called the north-seeking pole, or north pole, of the magnet.
Where is the magnetic field the 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 least dense at the center and densest between the two poles just outside the bar magnet.
Why do magnetic lines of force move from north to south?
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.
How can you see a magnetic field?
- put a piece of paper over a magnet (this stops the iron filings sticking to the magnet)
- sprinkle iron filings onto the paper.
- gently tap the paper to spread the filings out.
- observe and record the results.
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.
How do you determine the direction of an electric field?
For example, if you place a positive test charge in an electric field and the charge moves to the right , you know the direction of the electric field in that region points to the right.
Are electric field lines always straight lines?
In an uniform electric field, the field lines are straight, parallel and uniformly spaced . The electric field lines can never form closed loops, as line can never start and end on the same charge. ... If the electric field in a given region of space is zero, electric field lines do not exist.
How do you find the direction of an electric field?
The direction of electric field produced by negative charges is radially toward the charge , i.e. towards the point charge. In the given diagram we can see the two point charges +Q on y axis. One positive point charge is on the upper side of the y axis and another positive charge is on the lower side of the y axis.
What is the use of left hand rule?
Fleming’s Left-Hand Rule is a simple and accurate way to find the direction of force/motion of the conductor in an electric motor when the magnetic field direction and the current direction are known . It was originally developed by John Ambrose Fleming, an English electrical engineer, in the late 19th century.
What is the left hand rule for coils?
Fleming’s left hand rule helps you to predict the movement . When a coil of wire carrying a current is placed in a magnetic field the coil turns. This is called the motor effect.
