Derive R=ρl 2 marks question for 10th class
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Specific resistance is defined as the resistance of a conductor of unit length and unit area of cross-section.
DERIVATION:
R ∝ l
R ∝ 1/A
⇒R = ρl/A (where 'ρ' is a constant known as 'resistivity' or 'specific resistance')
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