Sometimes in a closed circuit special metals like tungsten become hot and some of the thermal (heat) energy is transferred to the air as radiation which produces ______. An example is the filament inside a bulb.
An electromagnet needs an ____________ ____________ to produce a magnetic field.
The current magnetizes the nail. It can be turned on and off with a switch. Because of this, we are able to make motors that turn. Picture the nail spinning as it repels and is attracted to the magnet around it. electric current current
For this gadget to work correctly, it must have a battery, a switch, a light bulb, and a conductor (wire). What is it? Hints: It is on a series circuit. The British call it a torch!
This is a model of an atom. Matter (solids, liquids, and gases) is made of atoms. The middle part has protons (positive charge) and the spinning around parts are electrons (negative charge). When we spin conductors (wire) through the magnetic field of magnets, we get a flow of electrons called _______________.