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.

$A$ device used for producing current is:

$(a)$ What is the direction of magnetic field lines inside a bar magnet and outside of it?
$(b)$ What does the degree of closeness of the field lines represent?

$(a)$ Name the type of electric current generated by most of the power stations in our country.
$(b)$ Why is it preferred over the other type?
$(c)$ State the frequency of the power supply generated in India.

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

$A$ 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.