What type of current is induced in the coil?
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What type of current is induced in the coil?
When a bar magnet is in relative motion to the coil current is induced in it. The current is AC because the needle of the galvanometer deflects to and fro when magnet is in relative motion with respect to coil.
How does electromagnetic induction occur in a coil?
It occurs whenever a magnetic field and an electric conductor move relative to one another so the conductor crosses lines of force in the magnetic field. The current produced by electromagnetic induction is greater when the magnet or coil moves faster, the coil has more turns, or the magnet is stronger.
How can we induce current?
This change may be produced in several ways by:
- change the strength of the magnetic field.
- moving the conductor in and out of the field.
- altering the distance between the magnet and the conductor, or changing.
- the area of a loop located in a stable magnetic field.
What are the two ways to induce current in a coil Class 10?
(i) If a coil is moved in a magnetic field. (ii) By bringing a bar magnet close to the coil or taking away from it. (iii) By rotating the coil in a uniform magnetic field.
How can voltage be induced in a wire?
You can induce a voltage into a wire by turning it into a coil and moving a magnet through it.
How do you calculate induced current?
Calculate the time derivative of the flux, dΦB/dt. The magnitude of the induced EMF, |εind| is equal to |dΦB/dt|. If you need to find a current, you can frequently find it using Ohm’s Law, I = ε/R, where R is the resistance of the wire.
How can the magnitude of induced current in a coil be increased?
The magnitude of the induced current can be increased by: 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.