What inferences were drawn from Oersted's experiment.

Kunal draws magnetic field lines close to the axis of a current carrying circular loop. As he moves away, towards the centre of the circular loop, he observes that the lines keep on diverging. How will you explain his observation?

Describe the magnetic field produced by a solenoid carrying current.

Electricity and magnetism are linked to each other.
Why does a current carrying solenoid when suspended freely rest along a north-south direction?

What is the importance of Oersted's experiment?

What is a solenoid? Can you determine the North and South poles of a current-carrying solenoid with the help of a bar magnet? Explain.

The diagram shows a current carrying wire passing through the centre of a square card board. The magnetic field at points $A$, $B$  and $C$ is:

Observe the given figure of Fleming' s Right Hand Rule and write the labels of A and B correctly.

The diagram below shows a magnetic needle kept just below the conductor AB which is kept in the North-South direction.

i) In which direction will the needle deflect when the key is closed?

ii) Why is the deflection produced?

iii) What will be the change in the deflection if the magnetic needle is taken just above the conductor AB?

iv) Name one device which works on this principle.

The following diagram shows a spiral coil wound on a hollow cardboard tube AB. A magnetic compass is placed close to it. Current it switched on by closing the key. (a) What will be the polarity at the ends A and B?

(b) How will the compass needle be affected? Give reason.

A straight wire lying in a horizontal plane carries a current from north to south.

(a) What will be the direction of magnetic field at a point just underneath it?

(b) Name the law used to arrive at the answer in part (a).