Physics, asked by gnegi5381, 27 days ago

calculate the resistance of a hollow cylinder made of copper with inner radius 3 cm and outer radius 3.5 cm and is 12 cm long .(specific resistance of copper is 1.68 × 10^-8 ohm metre.)

Answers

Answered by gyaneshwarsingh882
0

Answer:

Explanation:

Given that: l = 1 m

Inner radii, r1 = 10 cm = 0.1 m ; Outer radii, r2 = 20 cm = 0.2 m

begin mathsize 12px style Cross space sectional space area comma space straight A space equals space straight pi space left parenthesis straight r subscript 2 squared space minus straight r subscript 1 squared space right parenthesis space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 3.14 space left square bracket left parenthesis 0.20 right parenthesis squared space minus space left parenthesis 0.10 right parenthesis squared right square bracket space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 9.42 space cross times space 10 to the power of negative 2 end exponent space straight m squared Resistivity comma space straight R space equals ρl over straight A space equals fraction numerator 2 cross times 10 to the power of negative 8 end exponent cross times 1 over denominator space 9.42 space cross times space 10 to the power of negative 2 end exponent end fraction straight R equals space 2.1 space cross times space 10 to the power of negative 2 end exponent space straight capital omega end style

Similar questions