One should always use rubber gloves and rubber shoes when dealing with electricity.

State the observation made by Oersted on the basis of his experiment with current carrying conductors.

In an electric motor,the direction of current in the loop reverses after every $........$ rotation.

For the circular coil carrying current shown alongside,draw magnetic field lines. Decide which of its face behaves as north pole and which face as south pole. Give reason to justify your answer.

Identify the type of magnetic fields represented by the magnetic field lines given below and name the type of conductors which can produce them.

$A$ magnetic compass shows a deflection when placed near a current-carrying wire. How will the deflection of the compass be affected if the current in the wire is increased? Support your answer with a reason.