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An electric cable of copper has just one wire of radius 9 mm Its resistance...

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An electric cable of copper has just one wire of radius 9 mm Its resistance is 5 ohm This single copp of cable is replaced by 6 different well insulated copper wire each of radius 3 mm The total resistane 13 cable will now be equal to B 9092 C 7 592 D 27092 A 450 6 A uniform wire of resistance 20 ohm having resistance 152 m is bent int the form of a circle as shown in 19 If the equilvalent resistance between M and N is 1 892 then the length of the shorter section is 5 M N 104 A 2m B 5m C 1 8m D 18m Resistivity of a conductor in which a current density 2 5 Am2 is found to exist when an electric field is applied to it is pq 10 A 60m B 72m EC 40m A D 80m

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