A Conductor of Radius R, Length and Resistivity ρ

question 20

Multiple Choice

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

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A psychologist known for his research on the effects of stress, social support, and the common cold on human health and well-being.

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