The electrical resistance of copper wire varies directly with its length and inversely with the square of the diameter of the wire. if a wire 30m long with a diameter of 3 mm has a resistance of 25 ohms, find the resistance of a wire 40m long with a diameter of 3.5 mm
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Physics, 22.06.2019 10:30
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A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.
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The electrical resistance of copper wire varies directly with its length and inversely with the squa...
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