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The diagram below shows a meter shunted by a parallel resistance Rs. The maximum value for...

The diagram below shows a meter shunted by a parallel resistance Rs. The maximum value for Im is 1 mA and the meter has a resistance (Rm) of 0.2 ΩΩ. Given that the maximum current (I) is 75A:

a)

What should the shunt resistance (Rs) be? Give your answer to the nearest whole μΩa)

b)

Given that the shunt is made from a cylinder of copper of 1.68 x 10−8Ωm10−8Ωm and is 50cm long, what should its diameter (D) be?

Takeππ to be 3.142 and give your answer to 2 decimal places.

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