Question

Explain the magnetic effects of electric current

Answer 1

magnetic effect of electric current is one of the major effects of electric current in use, without the applications of which we cannot have motors in the existing world. A current carrying conductor creates a magnetic field around it, which can be comprehended by using magnetic lines of force or magnetic field lines. The nature of the magnetic field lines around a straight current carrying conductor is concentric circles with centre at the axis of the conductor.............

Answer 2

●THE MAGNETIC EFFECT OF ELECTRIC CURRENT.

Here we will know the magnetic effects of electric current through Orested's Experiment.

◾Activity

★Aim: To observe the magnetic effect of current.

★Materials required: simple circuit, mariner's compass.

★Method

1. Make a circuit as shown in the attachment.

2. Place a mariner's compass under or near the conducting wire. With the switch in the off position note the direction in which the needle points.

3. Now switch on the current What do you observe? Is the needle deflected from its direction?

4. Switch off the current. Does the needle come back to its north-south position? What does this show?

5. Reverse the direction of current In which direction does the needle. deflect now?

★Observations: You will observe that the needle of the mariner's compass is deflected when current is passing through the circuit. When the direction of current is reversed, the deflection of the needle is in the opposite direction.

★Oersted's Experiment

In 1820, Danish scientist Hans Christian Oersted observed that the needle of a compass deflected when it was near an electric circuit.

A compass needle can only be deflected by a magnet. Therefore, the Activity shows that a wire carrying an electric current exerts a magnetic effect around it. The area around the wire where the magnetic influence is felt is called the magnetic field.

_____________________