Fill in the following blanks with suitable words : When an electric current is passed through a coil wrapped around an iron nail, the iron nail behaves like a ________.
When current is passed through a circular wire prepared from a conducting material, the magnetic field produced at its centre is B. Now a loop having two turns is prepared from the same wire and the same current is passed through it. The magnetic field at its centre will be :
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
BEIITIANS-ELECTRIC CURRENT AND ITS EFFECTS-IIT JEE WORKSHEET (V. Matrix Matching)
