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28 A current of 8 A flows in a metallic conductor of cross section 1...

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28 A current of 8 A flows in a metallic conductor of cross section 1 cm and length 10 km Free electron density of copper is 5x1028 m The time taken by the electron to travel from one end of the conductor to the other is 1 108 sec 3 107 sec 2 10 sec 4 105 sec

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