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maw [93]
3 years ago
11

What is the resistance of a 20.0-meter-long

Physics
2 answers:
irina [24]3 years ago
4 0

Answer:

Option (2)

Explanation:

The resistance of a conductor is directly proportional to the length of the conductor and inversely proportional to the area of the conductor. The formula for the resistance is given by

R = \rho \frac{l}{a}

Where, ρ is the resistivity of tungsten, l be the length of tungsten and a be the area of cross section.

The value of resistivity for tungsten is 5.6 x 10^-8 ohm metre.

R = 5.6\times 10^{-8} \times \frac{20}{10^{-4}}

R = 1.12 \times 10^{-2} Ohm

IgorC [24]3 years ago
3 0
I'm pretty sure it's 8, I could be wrong though
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