Question

What happens to the resistance and resistivity of a material if:
1.Diameter is doubled?
2.Radius us doubld?

Need a detailed explanation...
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Answer 1

Answer:

1)DIAMETER:If the diameter of a circle is doubled, its area increases 4 times.

2)RADIUS:The area of a circle is equal to the square of its radius times pi. The circumference of a circle is equal to the diameter times pi. ... So when you double the radius, the area goes up by 4 times because 2 squared is 4. The area will always go up by the square of how much the radius goes up.

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