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Determine the diameter of 500 metres of wire having a resistance of 2.8 ohms if the resistance (R) is proportional to the length (1) and

Determine the diameter of 500 metres of wire having a resistance of 2.8 ohms if the resistance (R) is proportional to the length (1) and varies inversely as the square of the diameter (d) and R = 1.313 ohms when I = 150 m and d = 4 cm.

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