When we pull the magnet out, the left hand end of the coil becomes a south pole (to try and hold the magnet back). Therefore the
induced current must be flowing clockwise
.
What happens to the current through the wire as the magnets are removed from the coil?
This current produces a magnetic field proportional to the current. The magnetic field aligns the spins in the ferromagnetic material. As the material moves away from the coil,
the magnetic field decreases
, and the spins remain aligned until they enter another magnetic field (when they are erased).
What is observed when the magnet is moved towards the coil?
In the given question, when the north end of the magnet is moved into the coil,
emf is induced in the coil and current starts to flow
. The direction of the flow will be so that it opposes the movement of the magnet into it. Therefore, the direction of current generated is anticlockwise as seen from the magnet side.
What will happen if the magnet is continuously getting in and out of the coil?
The student observes deflection in the galvanometer connected to the coil. What will happen if the magnet is continuously getting in and out of the coll? (a)
the current induced in the coil will increase
. … (d) the magnetic field of the bar magnet would keep decreasing.
What happens when you move the north side of the magnet into the coil?
What happens as you move the north side of the magnet into the coil? [When we move to the north side of the magnet,
the induced current in a coil flows in an anti-clockwise direction
. This makes the left end of the coil into a ‘north pole’. This is due to a law known as Lenz’s Law.]
Where is the strongest attraction force of the magnet?
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.
What happens to magnetic field when current is increased?
When a direct electric current is passed through it, the shape of the magnetic field is very similar to the field of a bar magnet. … The strength of the magnetic field around a solenoid can be increased by:
increasing the number of turns on the coil
.
increasing the current
.
Do magnets affect electricity?
Magnets will affect the electrical current inside the non-conductive pipe
, and vice versa. Moving charges, aka current, produce a magnetic field around them. The natural law concerning electrical currents producing magnetic fields is known as Ampere’s circuital law.
What will it happen in galvanometer when the magnet is at rest or it moves toward the coil?
This involves generating a voltage by changing the magnetic field that passes through a coil of wire. … If the magnet is held stationary near, or even inside, the coil, no current will flow through the coil. If the magnet is moved,
the galvanometer needle will deflect, showing that current is flowing through the coil
.
What would happen if a bar magnet is pulled out again?
(ii) If a bar magnet is withdrawn from inside, again
current will be induced in the copper wire due to electromagnetic induction
but this time the direction of current will be reverse in galvanometer.
What happens as you move the south side of the magnet into the coil?
Similarly, if you flip the magnet to bring its south pole towards the coil,
the current flows in the direction that produces a magnetic field whose south pole faces the magnet
, and if you pull the magnet away, it reverses so that the north pole faces the magnet.
Did the needle of galvanometer move while the magnet was at rest inside the coil?
At starting, the magnet is at rest
, so there is no deflection in the galvanometer i.e needle of galvanometer is at the center or zero position. … Similarly, if magnet is held stationary and the coil is moved away and towards the magnet, the galvanometer shows deflection in similar manner.
What would happen if a bar magnet within a coil of wire was pulled out of the coil at the same speed as it was pulled in?
If additional layers of wire are wound upon the same coil with the same current flowing through them,
the static magnetic field strength would be increased
. … By moving this bar magnet “in” and “out” of the coil a current would be induced into the coil by the physical movement of the magnetic flux inside it.
What part of the magnet is 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.
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.
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.
