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A Conductor of Radius R, Length and Resistivity ρ

Question 20

Multiple Choice

A conductor of radius r, length A conductor of radius r, length and resistivity ρ has resistance R. It is melted down and formed into a new conductor, also cylindrical, with one fourth the length of the original conductor. The resistance of the new conductor is A) R B) R C) R D) 4R E) 16R and resistivity ρ has resistance R. It is melted down and formed into a new conductor, also cylindrical, with one fourth the length of the original conductor. The resistance of the new conductor is


A)
A conductor of radius r, length and resistivity ρ has resistance R. It is melted down and formed into a new conductor, also cylindrical, with one fourth the length of the original conductor. The resistance of the new conductor is A) R B) R C) R D) 4R E) 16R R
B)
A conductor of radius r, length and resistivity ρ has resistance R. It is melted down and formed into a new conductor, also cylindrical, with one fourth the length of the original conductor. The resistance of the new conductor is A) R B) R C) R D) 4R E) 16R R
C) R
D) 4R
E) 16R

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