Problem 30.28 What is the resistance of Part B A 20.0cm long piece of carbon with...

Question

Question

Problem 30.28 What is the resistance of

Part B

A 20.0cm long piece of carbon with a 0.900mm

Answer 1

Answer #1

Resistivity Of carbon

p=35*10^-6 ohms/m

Area

A=(0.9*10^-3)²

Resistance

R=pL/A =(35*10^-⁶)(0.2)/(0.9*10^-3)²

R=8,64 ohms

Answer 2

Answer #2

length= 20 cm = .2 meter

area = .81 mm^2 =8.1*10^-7 m^2

resistivity =1.68

Answer 3

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