Who first observed the magnetic effect of an electric current?

Mention the shape of the magnetic field lines around a current-carrying straight conductor.

What is short-circuiting in an electric supply?

Can a freely suspended current-carrying solenoid stay in any direction? Justify your answer. What will happen when the direction of current in the solenoid is reversed? Explain.

What is the shape of the magnetic field lines inside a solenoid?

Make a table with names of three electrical appliances used in your home in one column, their power, voltage rating, and approximate time for which each is used in one day in the other columns.