Thus, the magnetic field lines point
away from the north pole of a magnet and toward its south pole
. Figure 20.9 The black lines represent the magnetic field lines of a bar magnet.
What is the direction of magnetic field lines in bar magnet?
The magnetic field lines for a bar magnet emerges
from the north pole and enters the south pole
. The properties of these magnetic field lines are that it always emerges from the north pole of the magnet and enters the south pole.
What is the direction of magnetic lines of force?
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
.
What is the direction of the magnetic lines of force inside and outside the 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.
Is there a uniform magnetic field inside a bar magnet?
No, the magnetic field lines inside the bar magnet are
non-uniform
. They are curved in the nature.
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.
Do opposite ends of a magnet attract?
When two magnets are brought together,
the opposite poles will attract one another
, but the like poles will repel one another. This is similar to electric charges. Like charges repel, and unlike charges attract. Since a free hanging magnet will always face north, magnets have long been used for finding direction.
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.
Where is magnetic field strength uniform in a bar magnet?
In the case of a bar magnet, A bar magnet produces a non-uniform magnetic field that can be seen by the magnetic lines of force arising from
the north pole of the magnet and progressing towards the south pole of the magnet
.
Is the field around the bar magnet uniform or non-uniform Why?
The magnetic field due to a bar magnet is
non-uniform
. The magnetic field in an area is non-uniform if it has dissimilar magnetic intensities at diverse points in the area.
Why the magnetic force is not uniform in any magnet?
Because
each dipole is effected by the magnetic that exist in its positions
, if the magnetic field is non-uniform then the forces on the north pole and on the south pole won’t be equal and the magnet will experience a total force different from 0.
What is Fleming’s left and right hand rule?
Fleming’s
left-hand rule is used for electric motors
, while Fleming’s right-hand rule is used for electric generators. … In an electric motor, the electric current and magnetic field exist (which are the causes), and they lead to the force that creates the motion (which is the effect), and so the left-hand rule is used.
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.
Can you force two magnets together?
Yes,
stacking multiple magnets together can make them stronger
. Two or more magnets stacked together will exhibit nearly the same strength as a single magnet of the combined size.
Which is the best procedure to make a permanent magnet?
Take two magnets put one North pole and one South pole on the middle of the iron
. Draw them towards its ends, repeating the process several times. Take a steel bar, hold it vertically, and strike the end several times with a hammer, and it will become a permanent magnet.
