Generator is a device that converts the mechanical energy of coil rotation into electrical energy;

To verify the relationship between the magnitude of induced current and the speed of conductor cutting magnetic induction line, it is necessary to ensure that other factors remain unchanged and the moving speed of conductor remains unchanged, and observe the deflection angle of ammeter pointer, so as to draw a conclusion;

The actual motor is not a single wire, but a coil wound with multiple wires, which shows the influence of the number of turns of the coil on the induced current. Large generators also use electromagnets with stronger magnetism instead of natural magnets, which shows that the magnitude of induced current is related to the strength of magnetic field.

So, the answer is: mechanical; Electricity; Under the same conditions, let the conductor cut the magnetic induction line at different speeds and observe the deflection degree of the sensitive galvanometer pointer; Magnetic field strength.