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Question
Write an expression for the resistivity of a substance. Give the meaning of each symbol which occurs in it.
Equation/Formula
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Solution
Resistivity (ρ) = `R xx A/l`
Where,
R is the resistance of the conductor.
A is the cross-sectional area of the conductor.
l is the length of the conductor.
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Chapter 4: Electricity - Exercise 4 [Page 215]
