A wire of length L and resistance R is cut into 4 equal pieces.If the 4 pieces are now twisted together to make a wire of length L/4,what is the new resistance of the shorter wire combination?
A)R/16
B)R/4
C)R
D)4R
E)16R

Question

Quizplus · Accepted Answer

When the wire is cut into 4 equal pieces, each piece has a resistance of R/4. When these pieces are twisted together in parallel, the total resistance is (R/4)/4 = R/16.

A Wire of Length L and Resistance R Is Cut