a. What diameter of copper wire [p = 2.65 x 10^-8 ohm.m) should be used so that a 22.0 m length will have a resistance of 0.39 ohm? b. Find the temperature coefficient of resistivity for this wire if an increase in temperance of 120 degree C changes the resistance from 0.39 ohm to 0.62 ohm.
a. What diameter of copper wire [p = 2.65 x 10^-8 ohm.m) should be used so that a 22.0 m length will have a resistance of 0.39 ohm? b. Find the temperature coefficient of resistivity for this wire if an increase in temperance of 120 degree C changes the resistance from 0.39 ohm to 0.62 ohm.
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a. What diameter of copper wire [p = 2.65 x 10^-8 ohm.m) should be used so that a 22.0 m length will have a resistance of 0.39 ohm? b. Find the temperature coefficient of resistivity for this wire if an increase in temperance of 120 degree C changes the resistance from 0.39 ohm to 0.62 ohm.
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