Question

Part A Determine the ratio of the resistances of two wires that are identical except that...

Part A

Determine the ratio of the resistances of two wires that are identical except that wire A is twice as long as wire B.
RARB =

Part B

Determine the ratio of the resistances of two wires that are identical except that wire A has twice the radius of wire B.
RARB =

Part C

Determine the ratio of the resistances of two wires that are identical except that wire A is made of copper and wire B is made of aluminum. The resistivity of aluminum is 2.8 ×10−8Ω⋅m, the resistivity of copper is 1.7 ×10−8Ω⋅m.
RARB =
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