The clockwise current creates a self
-field downward
, trying to offset the increase of magnetic flux through the coil as it moves upward into stronger fields (Lenz’s Law). The I ds x B force on the coil is a force which is trying to keep the flux through the coil from increasing by slowing it down (Lenz’s Law again).
What direction is the magnetic field of a clockwise current?
The clockwise current creates a self
-field downward
, trying to offset the increase of magnetic flux through the coil as it moves upward into stronger fields (Lenz’s Law). The I ds x B force on the coil is a force which is trying to keep the flux through the coil from increasing by slowing it down (Lenz’s Law again).
What is the direction of the magnetic field in the center of the loop in a?
The direction of magnetic field at the centre of circular coil is
perpendicular to the place of the coil
. i.e. along the axis of the coil.
What is the direction of magnetic field at the Centre of a circular loop when current is flowing clockwise?
If the current is clockwise, then
magnetic field is away from you
and if the current is anticlockwise, then magnetic field is towards you.
What change is noticed in induced current when the direction of magnetic field is reversed?
Answer: If the magnetic field is reversed then the direction of
induced current will also be reversed
.
How do you tell if current is clockwise or counterclockwise?
It is “
clockwise
” when you look at your hand thumb-on, or when you look at the change pointing towards you. This means that if a current follows that curling, it goes to a higher voltage; or if it opposes that curling, it goes to a lower voltage. This same “reverse” rule can also be phrased as Lenz’s law.
What is the magnetic field inside the solenoid?
Inside a solenoid the magnetic field lines will be straight lines and the field will be strong. Outside the solenoid the magnetic field will be weak and the field lines will curl up to form closed loops. Hence, the magnetic field inside a solenoid
will be uniform
.
What direction is the magnetic force on the loop?
A current loop with magnetic moment pointing to the left is in a magnetic field that decreases in magnitude to
the right
. When these forces are summed to find the net force on the loop, the radial components cancel so that the net force is to the right, away from the magnet.
Why does number of loops increase magnetic field?
~The total induced emf is equal to the emf induced in each loop by the changing magnetic flux, multiplied by the number of loops. When you increase the number of loops, you increase the total induced emf, which
makes more current flow through the bulb
, which causes it to shine more brightly.
What will be the direction of magnetic field in a circular loop?
At the centre of circular wire,field
lines become straight and perpendicular to the plane of coil
. Right hand thumb rule is used to determine the direction of magnetic field produced due to current carrying circular wire.
What is the direction of the magnetic field lines inside the loop due to the clockwise current in the loop?
As seen from the side of the approaching magnet the current inside the coil should be
clockwise
so that the induced magnetic pole on the left side of the coil is ‘south’ and it tends to repel the approaching magnet(Lenze’s Law), hence the magnet’s field inside the coil points from right to left(opposite to the …
What is Biot Savart’s law?
The Biot-Savart law states
how the value of the magnetic field at a specific point in space from one short segment of current-carrying conductor
depends on each factor that influences the field. … In addition, the magnetic field at a point depends upon how far the point is from the current element.
What happens if the direction of magnetic field is reversed?
Answer: The magnetic field generated is always perpendicular to the direction of the current and parallel to the solonoid. Hence if we reverse the current the direction of magnetism also reverses. In other words the
magnetic poles
gets reversed (North pole becomes south pole and the south pole becomes the north pole).
What happens to force when direction of magnetic field is reversed?
What happens to the force acting on current carrying conductor placed in magnetic field when: (a) Direction of
magnetic field is reversed without changing the direction of current
. (b) Direction of the current is reversed without changing the direction of magnetic field.
What gives the direction of induced current?
This rule states that if the thumb, index finger and middle finger of the right hand are outstretched in a mutually perpendicular fashion such that the thumb points towards the direction of the relative motion of the conductor and the index finger points towards the magnetic field, then the direction of the induced …
