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25-02-2020
Physics

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4) A copper cable has a current of 1200 A running through it. There is a potential difference of 0.016 V between two points on the cable that are 0.24 m apart. Calculate the radius of the cable.

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pstnonsonjoku pstnonsonjoku

25-02-2020

Answer: 99×10-3m or 0.99cm

Explanation:

The detailed solution is found in the image attached. We can obtain the resistance from ohms law, V=IR.

Using this value obtained for resistance, we substitute into the equation shown in the solution to find the area of the cable. Afterwards, the radius of the cable can be obtained from its area as shown in the solution.

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