Thursday
April 24, 2014

Homework Help: Physics

Posted by Lauren on Thursday, July 26, 2012 at 10:14pm.

If a wire of resistance R, resistivity "roe", length L, and cross sectional area A, had its length doubled and radius halved, what would be the ratio of R'/R. Where R' is the new resistance of the wire.

I thought it would be 4 times R, giving the ratio of 4R:R'
However, I plugged theoretical numbers in to check and it did not match what I thought. Can someone please explain the ratio to me?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - Two wires with the same resistance have the same diameter but ...
Physics - A copper wire has a resistance of 24 Ω at 20C. An aluminum wire ...
Physics!! Help!!!!! - A wire of length L and cross-sectional area A has ...
physics - German silver wire has a cross-sectional area of 2.047 x 10^-3 cm^2. ...
PHYSICS 2 - Two wires have the same cross-sectional area and are joined end to ...
physics - Two wires have the same cross-sectional area and are joined end to end...
PHYSICS - Two wires have the same cross-sectional area and are joined end to end...
physics - Two wires have the same cross-sectional area and are joined end to end...
physics PLEASE HELP - Two wires have the same cross-sectional area and are ...
Physics - A 100 m long wire with a cross-sectional area of 4 mm2 has a ...

Search
Members