- Taking the conductor in the form of a coil of many turns of insulated wire.
- Increasing the strength of the magnetic field used.
- Increasing the rate of change of magnetic flux associated with the coil.
What happens if you increase the current in a coil?
When the current is broken the field collapses, the magnetic lines of force in the field cut through the coil windings creating
a new higher voltage than
was induced resulting in higher current for a split second resulting in a larger longer spark than was seen when the connection was made.
Do more coils increase current?
Even accounting for this, a conductor in a circuit will always allows current to flow, so adding more turns to the coil results in
a proportional increase in the number of current loops
contributing to the net magnetic field.
Does number of coils affect current?
Even accounting for this, a conductor in a circuit will always allows current to flow, so adding more turns to the
coil results in a proportional increase in the number of current loops
contributing to the net magnetic field.
How can induced current be increased?
Taking the conductor in the form of a coil of many turns of insulated wire.
Increasing the strength of the magnetic field used
. Increasing the rate of change of magnetic flux associated with the coil.
Where is the strongest magnetic field in a coil?
The strongest external magnetic fields are
near the poles
. A magnetic north pole will attract the south pole of another magnet, and repel a north pole.
Does more loops mean more current?
Even accounting for this, a conductor in a circuit will always allows current to flow, so adding more turns to the coil results in
a proportional increase in the number of current loops
contributing to the net magnetic field.
What does Faraday’s law state?
This relationship, known as Faraday’s law of induction (to distinguish it from his laws of electrolysis), states that
the magnitude of the emf induced in a circuit is proportional to the rate of change of the magnetic flux that cuts across the circuit
.
What happens if you increase the current in a motor?
An increase in current is a danger to the motor only if that
current exceeds the motor’s nameplate current rating
. When amps go above the nameplate rating, heat begins to build up in the motor. Without a timely correction, this heat will damage the motor.
What happens if you hold a nail or paper clip near the coil?
Describe what happens if you hold a nail or paper clip near the coil. …
The object vibrates, or gets pulled into the coil
.
What will happen if we increase the number of turns of a coil of a motor?
Increasing the number of turns of wire in the coil – By increasing the amount of individual conductors cutting through the magnetic field,
the amount of induced emf produced will be the sum of all the individual loops of the coil
, so if there are 20 turns in the coil there will be 20 times more induced emf than in one …
How does adding more coils make an electromagnet stronger?
Putting a piece of iron or steel inside the coil makes the magnet strong enough to attract objects. The strength of an electromagnet can be increased by
increasing the number of loops of wire around the iron core and by increasing the current or voltage
.
Where is a magnet’s force strongest?
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.
Where is the magnetic field the weakest?
The magnetic field is weakest
at the center
and strongest 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 does the magnetic field of a coil depend on the current in the coil?
A wire coil that is carrying a current produces a magnetic field B( r), where r is the distance from the center of the coil to the field point. The strength of the
field B is proportional
to the current I in the coil. The strength and direction of the field depend on r. … For large distances both fields fall off as 1/r3.
Which electromagnet is the strongest?
Bitter electromagnets
have been used to achieve the strongest continuous manmade magnetic fields on earth―up to 45 teslas, as of 2011.
