Resistance resists

Calculate resistance of a wire if the following are given -

$Mass$ = $50 g$

$Resistivity$ = $1.8 * 10^{-9} ohm-metre$

$Length$ = $5 m$

$Density$ = $1.8 * 10^{6} kg/m^{2}$

#ElectricityAndMagnetism

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Comments

Mass=volume×density. Volume=area×length. Resistance=resistivity×length÷area Resistance=resistivity ×length×length÷volume

Jilan Basha - 4 years, 12 months ago

Size of wire = Mass / Density = (50/1000) / (1.8*10^6) = S
Resistance = (Resistivity * Length) / Size = (1,810^-95) / S

L TV - 5 years, 9 months ago

Can you provide more detailed steps along with the answer? i tried the same method.

Sahba Hasan - 5 years, 9 months ago

5*10^{-15}

madhav srirangan - 5 years, 9 months ago

$R=\rho\cdot \dfrac{L}{A}$

We only need to find $A$ . For that, first figure out what the volume is (using density and mass) and then divide it by L to get $A$ .

Rahul Saha - 5 years, 9 months ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$