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Transcript
Name_______________________Test Date______________ MAGNETISM AND ELECTRICITY STUDY GUIDE VOCABULARY: D-cell: a source of electricity induced magnetism: when an object becomes magnetized and can attract other objects because it is stuck to a permanent magnet switch: open and closes a circuit insulators: are materials that do not allow electricity to flow through it conductor: a material that allows electricity to flow through it prediction: an educated guess based on data or previous experience circuit: a pathway through which electric current flows components: the individual items in a circuit FACTS TO KNOW: A motor is not needed in an electromagnet; however, a battery (or power source) is needed. A soup can will stick to a magnet but WILL NOT conduct electricity. Wire wound more times on the core will make an electromagnet stronger. In a parallel circuit, each bulb has its own pathway to the power source. For example, Christmas lights that remain lit when one bulb goes out is an example of a parallel circuit. A series circuit can have more than one receiver but all receivers will turn off when the wires are disconnected from the battery (or power source). The distance between a magnet and another object can affect the strength of the magnetism. The needle on a compass points toward a magnet. A penny and a basketball hoop are conductors of electricity because they are made of metal with iron in it. Two magnets can attract (pull together) or repel (push apart) by using the north and south poles. In order for a circuit to be complete, it must have a power source and a receiver. This is a schematic drawing of a series circuit. The symbols are labeled for you. These are all examples of parallel circuits. If one light turns off the other will stay on.