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What is the current in a copper wire that has a resistance of 3 ohms and is connected to a 9-volt electrical source?
Wiki User
∙ 13y ago
3 amperes. Ohm's law: Voltage is ohms times amperes.
Wiki User
∙ 13y ago
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What is the current in a copper wire that has a resistance of 2 ohms and is connected to a 9-volt electrical source?
Current equals Voltage divided by Resistance. 9/2=4.5 amps.
What is the path that an electrical current travels?
electric current
How electrical resistance can be measured in copper and aluminium?
Same as for any other substance: Apply a voltage and measure the current flow. (Resistance equals voltage divided by the current flow.)
What is the current in a copper wire that has a resistance of 4 ohms and is connected to a 9-volt electrical source?
I = E/R = 9/4 = 2.25 AmpereThe wire is dissipating 20.25 watts, and is getting pretty hot.
Why does copper have a low resistance?
Because it is a metal so has lots of free electrons which when connected to a circuit detach from the atoms and move around the circuit. This produces a high current, so resistance will be low as current is high.
Does copper need a voltage to produce a current?
Copper can not of itself produce a current. <><><><><> However, resistance, be it copper or some other material, will produce a current if a voltage is applied to it. The rule is Ohm's law: Current = Voltage divided by resistance.
How many nano ohms transferred per meter in copper?
Gold has an electrical resistance of 22.14 nano ohms per meter (nΩ·m), while copper has an electrical resistance of 17.2 nΩ/m and silver has an electrical resistance of 15.87 nΩ/m.
Characteristics of copper?
Corrosion resistance and electrical conductivity. and its metal
What is specific-resistance?
Electrical resistivity is a measure of how a material opposes the flow of electric current. Copper is used for electrical lines because it has a low resistance relative to its cost. Gold and silver also have a low resistance, but imagine how expensive the power cord for your computer would be if it were made of gold!
Do copper carry current?
Yes, copper is a good electrical conductor.
What are some examples of items with low conductivity?
Thermal resistance: diamond Electrical resistance: copper Optical resistance: quartz
Why is copper used for electrical wiring instead of iron?
Copper wires conduct electricity much better than iron. This is because electric current passes through copper with very less resistance. it is also more ductile and malleable.
