i don't want a very scientifical answer. i need a definition that a 13-year-old could understand.
2006-10-11 08:04:05 · 8 answers · asked by jomama1234 2 in Science & Mathematics ➔ Physics
Ohm - The unit of resistance to the flow of an electric current.
2006-10-11 08:07:24 · answer #1 · answered by lilpinay 6 · 0⤊ 0⤋
A unit of electrical resistance, as in the equation V=IR, where V is the applied DC voltage, I is the current in Amperes, and R is the resistance in Ohms.
Ohms are also used as units of impedance -- like resistance, but for AC voltages and currents. The equation above is identical for AC but with impedence used rather than resistance.
FYI: color codes for carbon composition resistors.
black = 0; brown=1; red=2; orange=3; yellow=4; green=5; blue=6; vilolet=7; grey=8; white=9
silver=10% tolerance
gold=5% tolerance
no tolerance marking = 20% tolerance
If the resistor has black brown red then silver it is 10x10 to the 2nd power Ohm unit with 10% tolareance, i.e. 1,000 Ohms plus or minus 100 Ohms...
2006-10-11 08:16:10 · answer #2 · answered by HARLAN B 1 · 0⤊ 0⤋
An ohm is a measure of how hard it is for electricity to get through a material, also called the electrical resistance. An electrical resistance of 1 ohm means that it takes 1 volt of electric force to push 1 ampere of electric current through the material. If you apply 2 volts to this same material, 2 amperes of current will flow. This is called Ohm's Law.
Things that are good conductors of electricity have low resistance and perhaps only a small fraction of an ohm. Things that are good electrical insulators have high resistance and very many ohms, perhaps millions.
2006-10-11 08:05:51 · answer #3 · answered by Deep Thought 5 · 0⤊ 0⤋
Named after Georg Simon Ohm, Ohm's Law deals with the relationships between the Electromotive force Voltage (E), Current (I) and Resistance (R), in an electrical circuit. The law is E=I x R.
2006-10-11 08:12:32 · answer #4 · answered by J.D. 6 · 0⤊ 0⤋
Pronunciation: 'Om
Function: noun
Etymology: Georg Simon Ohm
: the practical meter-kilogram-second unit of electric resistance equal to the resistance of a circuit in which a potential difference of one volt produces a current of one ampere
Which is to say in English: an ohm is how much effort it takes electricity to push through a wire. An analogy would be how much effort it takes a spoon to push through chocolate pudding to the other side. It has to be chocolate of course for Joe Cool to try.
2006-10-11 08:13:37 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Ohm is a way to measure electrical resistance. Some things, like metal, conduct. Others, like rubber, resist.
2006-10-11 08:06:30 · answer #6 · answered by Beardog 7 · 0⤊ 0⤋
In its simplest form: the resistance to the flow of electricity.
2006-10-11 08:42:53 · answer #7 · answered by accrv 2 · 0⤊ 0⤋
It's what monks say when they are meditating.
2006-10-11 08:11:54 · answer #8 · answered by Anonymous · 1⤊ 0⤋