... found out that the iron rod picked up many filings when turned on and dropped them all when switched off but the steel rod picked few filings up when switched on, yet held on to them even after the current was switched off. For this experiment, the iron rod is needed. A high number of coils provides a stronger solenoid. When current flows through the wires it cerate's a magnetic field, therefore with more current a stronger magnetic field and therefore a stronger electromagnet would be created. The higher the voltage means the size of current will increase too. The stronger the magnetic field, the more filings will be attracted by the electromagnet. When the coils will be evenly spread across the rod, the current across the rod and the magnetic field will be even. Method: The apparatus will be set up to form a circuit, as below: I will use an iron ...

See this essay or coursework document in full right now