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3 years ago

A tungsten wire is 4.5 m long and 0.55 mm in diameter. what is its resistance?

1 answer:

3 0

First you need to know the formula for resistance, which is:

$R=$ ρ $\frac{L}{A}$ --- (A)

Where,
ρ = Resistivity
L = length
A = Area

ρ = Resistivity of tungsten = 5.28 x $10^{-8}$ Ωm
L = Length = 4.5 m
A = Area = 0.55 * $10^{-3}$ * π

Plug-in the values in equation(A), you would get:

$Resistance = \frac{5.28 *10^{-8} * 4.5}{0.55 * 10^{-3} * \pi }$

$Resistance = 1.375 * 10^{-4}$ Ω

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Answer:

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Explanation:

Given:-

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Find:-

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Solution:-

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B = ΔP / [(ΔV/V)]

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ΔP = (6400000 N/m^2) cm^2 / (100)^2 m^2

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Crazy boy [7]

Answer:

The answer is A. 10

Explanation:

Given 

f(x) = 3x - 11

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