Physics

Question

What would increase the resistance of a copper wire?

A. decreasing the wire’s thickness

B. decreasing the wire’s temperature

C. decreasing the wire’s length

1 Answer

  • R = ρl/A

    From the equation above R = Resistance, l = length, A = Cross Sectional Area of wire.

    From the equation, it can be seen that R would increase if the wire's area is reduced.

    If the area of the wire is reduced, means the same thing as:

    A. decreasing the wire’s thickness
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