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Whether or not you have 9 Ohms, depends on the resistance per unit length, and of the material of the wire, not on the number of turns.

You should be able to get the appropriate numeric data from a reliable encyclopedia, or from a source of electrical tables.

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11y ago

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How many amps will taken in sq mm copper wire?

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It will taken 8 amps <<>> The conversion of 2.5 sq mm wire to AWG is equal to a #12 wire. The ampacity of a #12 copper wire with an insulation factor of 90 degrees C is 20 amps.


What is larger 2.0 or 3.0 electrical wire?

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How thick is 26 gauge steel in mm?

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What length of a copper wire mm in diameter has a resistance of 100 ohm's?

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What is the difference between 10 awg and 12 awg speaker wire?

10 AWG wire will have less resistance per foot and therefore you can have longer runs with 10 AWG than 12 AWG without as much loss of signal. Additional to loss of signal there is a need to maintain a low impedance driving the typical speaker with its 4 ohm or 8 ohm coil resistance, to avoid frequency-distortion. A guide rule is that the speaker cable should have a total resistance around 1% of the speaker resistance (or less). On that basis, for 5 yards of speaker cable for a 4 ohm speaker the wire size would be 4 sq. mm (11 AWG) or for an 8 ohm speaker 2 sq. mm (14 AWG). <<>> Using the above formula of 1% of the speaker resistance the above answer is not correct. For a 4 ohm speaker at 1% is .04 ohms. The resistance of #12 wire is .001588 ohms per foot. This will allow you to run 25 feet and still stay within the parameters. For a 4 ohm speaker at 1% is .04 ohms. The resistance of #10 wire is .00100 ohms per foot. This will allow you to run 40 feet and still stay within the parameters. You can see, what the first answer states is correct.