If the distance between two
magnets is doubled the magnetic force between them will fall to a quarter of the initial value
. If the distance between two magnets is halved the magnetic force between them will increase to four times the initial value.
What is the relationship between electric and magnetic fields?
Electricity and magnetism are two related phenomena produced by the electromagnetic force. Together, they form electromagnetism.
A moving electric charge generates a magnetic field
. A magnetic field induces electric charge movement, producing an electric current.
What is the relationship between distance and magnetic field strength?
For both monopoles and dipoles, the
field strength decreases as the distance from the source increases
. , often called the inverse square law. For electric dipoles, the field strength decreases more rapidly with distance; as R
– 3
.
What is the relationship between electric current and magnetic field strength in an electromagnet?
When the electric current moves through a wire, it makes a magnetic field
. If you coil the wire around and around, it will make the magnetic force stronger, but it will still be pretty weak. Putting a piece of iron or steel inside the coil makes the magnet strong enough to attract objects.
What is the relationship between electric field and distance?
The strength of an electric field as created by source charge Q is
inversely related to square of the distance from the source
. This is known as an inverse square law. Electric field strength is location dependent, and its magnitude decreases as the distance from a location to the source increases.
Do all magnetic fields have the same strength?
The magnetic field generated by any magnet is always strongest at either pole.
The magnetic force is equally as strong at both the north and south pole
.
What are the similarities and differences between electric and magnetic fields?
Similarities between magnetic fields and electric fields:
Electric fields are produced by two kinds of charges, positive and negative
. Magnetic fields are associated with two magnetic poles, north and south, although they are also produced by charges (but moving charges). Like poles repel; unlike poles attract.
What are the fundamental differences between electric and magnetic fields?
The electric field is actually the force per unit charge experienced by a non moving point charge at any given location within the field, whereas the magnetic
field is detected by the force it exerts on other magnetic particles and moving electric charges
.
What’s the difference between electric and magnetic fields?
A magnetic field is a field explaining the magnetic influence on an object in space. A electric field is a field defined by the
magnitude of
the electric force at any given point in space. Current is the rate of charge moving past a region.
What is the importance of electricity and magnetism?
Electricity and magnetism are two very important topics in the science of physics.
We use electricity to power computers and to make motors go
. Magnetism makes a compass point North and keeps notes stuck onto our refrigerators.
What are the factors that affect the strength of an electromagnet?
The four main
factors that affect the strength of an electromagnet
are the loop count, the current, the wire size, and the presence of an iron core.
How does current affect electromagnetic strength?
The
magnetic field
is caused by the current flowing in the wire. The bigger the current the stronger the magnetic field and hence the stronger the electromagnet.
What are the strength and direction of the electric field?
The direction of the electric field due
to positive point charge is always acts away from the point charge
and electric field due to the negative charge acts towards the negative charge. The electric field is a vector quantity. They cannot be added directly, but can be added vectorially.
What does the strength of an electric field depend on?
The strength of the electric field depends on
the source charge
, not on the test charge. … Because an electric field has both magnitude and direction, the direction of the force on a positive charge is chosen arbitrarily as the direction of the electric field.
Which field is associated with capacitor?
Capacitors are devices which store electrical potential energy using
an electric field
. As such, capacitors are governed by the rules of electromagnetism.
Where is magnetic force strongest?
the closer the lines, the stronger the magnetic field (so the magnetic field from a bar magnet is strongest
closest to the poles
) the lines have arrowheads to show the direction of the force exerted by a magnetic north pole.
