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MCAT Physics Question — Wire Resistance
- by
- Aug 01, 2014
- MCAT Question of the Day
Resistance in a wire depends on:
I. cross-sectional area
II. the material comprising the wire
III. the length of the wire
a) I only
b) I and II only
c) II and III only
d) I, II and III
Explanation
Resistance in a wire follows the equation R=ρL/A where ρ is a property of the wire material, L is the length of the wire, and A is the cross-sectional area of the wire.
a) I only, incorrect.
b) I and II, incorrect.
c) II and III, incorrect.
d) I, II and III, correct.
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