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                                    (a) What is meant by electric resistance of a conductor?(b) Î wire of langth L and resistance R is stretched s that the length is doubled and area nf cross.section halved. How will0 resistance change?(ii) resistivity change? | 
                            
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Answer»  a. Resistanceisdefinedas the property of aconductorto resist the flow of charges through it. The resistance of conductoris numerically given as the ratio of potential difference across its length to the current flowing through it.  | 
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