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JEE Advanced 2020 Concept Recapitulation Test 3 Paper 2

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Question : 6

Total: 54

A long straight conductor, having a circular cross section of radius 2m carries a current along its length such its magnetic field varies as B=Kr2,0≤r≤2m, where K is a positive constant. The slope of the current density (j) vs radial distance 'r' at r=‌

. The value of α is.

4
8
2
3

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