A copper wire has a diameter of 0·2 mm and resistivity of 1·6 × 10⁻⁸ Ω m. What will be the length of this wire to make its resistance 14 Ω? How much does the resistance change, if the diameter of the wire is doubled?

Electric Potential and Potential Difference, Ohm's Law, Electrical Resistance, Factors Affecting Resistance of a Conductor, Resistivity of Materials, Resistors in Series Combination | PadhAiPro

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TextElectric Potential and Potential DifferenceOhm's LawElectrical ResistanceFactors Affecting Resistance of a ConductorResistivity of MaterialsResistors in Series CombinationCBSE PYQ

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