we often say "a current is going through the wire " What goes through the wire,the charge or the current ?

What is the effect on the magnetic needle in Oersted's experiment, when (1) a current is passed through the wire (2) the current through the wire is increased (3) The current through the wire to stopped (4) The current through the wire is reversed (5) The distance between jthe magnetic needle and the wire is increased , keeping the current through the wire constant ?

If 0.6 mol of electorns flows throutgh a wire in 45 min, what are (a) the total charges that passes through the wire and (b) the magnitude of the current?

A copper wire of length 1 m and radius is joined in series with an iron wire of length 2 m and radius 3 mm and a current is passed through the wire. The ratio of the current density in the copper and iron wires is

A silver wire of length 2m and radius 1mm is joined in series with an iron wire of length "4m" and radius "3mm" and a current is passed through the wires. The ratio of the current density in the silver and iron wires is

How does the heat H produced by a current passing through a fixed resistance wire depend on the magnitude of current I?

A long straight current carrying wire passes normally through the centre of circular loop. If the current through the wire increases, will there be an induced emf in the loop ? Justify.

If 0.8 mole of electrons flow through a wire in 55 minutes. What is (a) the total charge in kilocoulomb that passes through the wire and (b) the magnitude of the current? Avogadro's number =6xx10^(23) per mole.