Physics, 02.07.2019 00:10, tony7135

True false suppose i have a resistor of some resistance r. if i were to double the length and double the cross-sectional area of the resistor, what is the new resistance?

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answered: lilianna25

Explanation:

The resistance of a wire is given by :

$R=\rho\dfrac{l}{A}$

Where

$\rho$ is the resistivity of the wire

l = initial length of the wire

A = initial area of cross section

If length and the area of cross section of the wire is doubled then new length is l' and A', l' = 2 l and A' = 2 A

So, new resistance of the wire is given by :

$R'=\rho\dfrac{l'}{A'}$

$R'=\rho\dfrac{l}{A}$

R' = R

So, the resistance of the wire remains the same on doubling the length and the area of wire.

answered: Guest

Hahahahaha nice. my guess would be age or they moved the grocery store. ; ) and remind him next time you are late getting home that it takes a long time to go 12miles, hahahave a good one!

answered: Guest

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True false suppose i have a resistor of some resistance r. if i were to double the length and double...