What is meant by direction of magnetic field?
The magnetic field direction is the same direction a compass needle points, which is tangent to the magnetic field line at any given point. Magnetic field lines are defined to begin on the north pole of a magnet and terminate on the south pole.
What is the direction of the current?
The direction of an electric current is by convention the direction in which a positive charge would move. Thus, the current in the external circuit is directed away from the positive terminal and toward the negative terminal of the battery.
What is the direction of induced current in coil?
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 the direction of the induced magnetic flux in the coil?
The induced magnetic field is in a direction that tends to cancel out the change in the magnetic field in the loop of wire. So, you can use the Right Hand Rule to find the direction of the induced current by remembering that the induced magnetic field is opposite in direction to the change in the magnetic field.
How do you find the direction of induced emf in a coil?
Stretch the forefinger, middle finger and the thumb of the right hand mutually perpendicular to each other. If the force finger points in the direction of the magnetic field, the thumb gives the direction of the motion of the conductor then the middle finger gives the direction of the induced current.
What happens when there is a current in a coil?
When we induce a current in the coil, it becomes an electromagnet. One end of the coil is a north pole and the other end is a south pole. When the north pole of our magnet is moving towards the left hand end of the coil, the induced current flows anticlockwise (as we look at the left hand end).
Why does current produce magnetic field?
As Ampere suggested, a magnetic field is produced whenever an electrical charge is in motion. The spinning and orbiting of the nucleus of an atom produces a magnetic field as does electrical current flowing through a wire. The direction of the spin and orbit determine the direction of the magnetic field.
How current is produce?
Electric current can be generated by moving a metal wire through a magnetic field. It is also different than static electricity, which is the accumulation of charges on a surface. Electric generators rotate a coil of wires through a magnetic field.
Does AC current produce magnetic field?
AC magnetic field is generated when an alternating current is passing through a coil. The AC current is a time-varying current and it is often a sine-wave. Thus, the magnetic is also time-varying. There are several techniques for generating high-frequency magnetic field as discussed below.
How does magnetic field affect current?
The magnetic field exerts a force on a current-carrying wire in a direction given by the right hand rule 1 (the same direction as that on the individual moving charges). This force can easily be large enough to move the wire, since typical currents consist of very large numbers of moving charges.
What happens to the magnetic field when the current is reversed?
The magnetic field generated is always perpendicular to the direction of the current and parallel to the solenoid. Hence if we reverse the current the direction of magnetic field also reverses.