Question

The resistance of a piece of wire is (I) directly proportional to the length of the...

The resistance of a piece of wire is

(I) directly proportional to the length of the wire

(II) inversely proportional to the diameter of the wire

(III) directly proportional to the resistivity of the wire

(IV) directly proportional to the temperature in Celsius

The correct answers are

I and II

I, II and III

I and III

I and IV
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