| Revision as of 16:38, 30 October 2002 edit62.31.32.130 (talk) Don't stop the press.← Previous edit | Revision as of 19:06, 23 November 2002 edit undo198.81.26.198 (talk) Resistance in a nut shellNext edit → | ||
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| Electrical resistance can be one of two things. It can either be the resistance of a resistor in a a circut, or the resistance of a wire or both. In simple terms, the amount of Voltage you have in a wire is equal to the Current times the resistance. Voltage can be thought of as how swiftly a river is flowing. Current could be thought of how "wide" the river is, or in other words, how much water is flowing through the river at a given time. ex. A small stream would be small current, while the colorado river would be a lot of current. And resistance can be thought of as the river banks. So if resistance is high, there's a lot of narrowing in the river. If resisatance is low, the river runs wide and free. So that is resistance in its relation to "resistors" in an electrical circut. Now wire resistance is a different story. In order to find it you need 3 things. A. If you chop a section of wire, how much cross-sectional area does the wire cover. B. how "long" is the wire. C. The metallic constant which is dependant upon the metal you use, and the temperature of the metal. | |||
| Once upon a time there was a mongoose. One day he got bored, so he ran into a newspaper printer and screamed 'stop the press!' and, sure enough, they did. He soon realised that people were frowning at him so he quickly left. On the way home he saw a pig. He was so overjoyed, he jumped into a nearby river and drowned himself. The pig did not take kindly to this and grunted, he soon left and started having sex with a nearby hippo. They all lived hapily ever after. Except for the mongoose, who was dead, of course. | |||
Revision as of 19:06, 23 November 2002
Electrical resistance can be one of two things. It can either be the resistance of a resistor in a a circut, or the resistance of a wire or both. In simple terms, the amount of Voltage you have in a wire is equal to the Current times the resistance. Voltage can be thought of as how swiftly a river is flowing. Current could be thought of how "wide" the river is, or in other words, how much water is flowing through the river at a given time. ex. A small stream would be small current, while the colorado river would be a lot of current. And resistance can be thought of as the river banks. So if resistance is high, there's a lot of narrowing in the river. If resisatance is low, the river runs wide and free. So that is resistance in its relation to "resistors" in an electrical circut. Now wire resistance is a different story. In order to find it you need 3 things. A. If you chop a section of wire, how much cross-sectional area does the wire cover. B. how "long" is the wire. C. The metallic constant which is dependant upon the metal you use, and the temperature of the metal.