Question

Find the resistance of a wire whose length is 3mm and cross sectional area is 4mm^2 resistivity of wire is 1.7×10^-8 ohm meter

Answer 1

$\small \bf \red{ \huge \:Hola } \\ \\ \small \bf \pink{hey \: dude \: here \: is \: ans} \\ \\ \small \bf \pink{ \huge \: solution} \\ \\ \small \bf \pink{ \underline{according \: to \: question}} \\ \\ \small \bf \pink{as \: given} \\ \\ \small \bf \pink{a = 4 \: m {m}^{2} } \\ \\ \small \bf \pink{l = 3 \: mm} \\ \\ \small \bf \pink{ \rho =1.7 \times 10^{ - 8} } \\ \\ \small \bf \pink{ \underline{using \: to \: this \: formula}} \\ \\ \small \bf \pink{R = \rho\frac{l}{A} } \\ \\ \small \bf \pink{R= 1.7 \times 10^{ - 8} \times \frac{3}{4} } \\ \\ \small \bf \pink{R= \frac{5.1 \times {10}^{ - 8} }{4} } \\ \\ \small \bf \pink{ R=1.275 \times {10}^{ - 8} \: Ω} \:$