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A composite spherical shell of radius r 10 cm and wall thickness t 0 1...

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A composite spherical shell of radius r 10 cm and wall thickness t 0 1 mm is made of copper except an equatorial strip of width b 0 2 cm which is made of aluminium When the poles of the sphere are connected across an ideal battery of terminal voltage V 0 1 mV a current I 5 12 A flows through it If the aluminium strip is replaced by an iron strip of identical dimensions and the experiment is repeated with the same battery what current will flow through the battery Resistivities of aluminium and iron are pA 0 03 22 mm m and pre 0 10 22 mm m

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