`{:("Column- A ","Column - B "),("A] Commutator","i] detects the presence of electric current in a circuit."),("B] Fuse","ii] converts mechanical energy into electrical energy"),("C] Galvanometer","iii] measures the potential difference"),("D] Electric generator","iv] shows the direction of the motion of the conductor"),(,"v] protects the electrical appliances"),(,"vi] reverses the direction of current"),(,"viii] converts electrical energy into mechanical energy"):}`

Explanation

`{:(" Column - A" ," Column - A"),("A] Commutator","vi] reverses the direction of current"),("B] Fuse", "v] protects the electrical appliances"),("C] Galvanometer" ,"i] detects the presence of electric current in a circuit" ),("D] Electric generator", "ii] converts mechanical energy into electrical elergy"):}`