KcetCurrent ElectricityKCET 2017MCQ+1 / -02017A cylindrical conductor of diameter 0.1 mm carries a current of 90 mA . The current density ( in $\mathrm{Am}^{-2}$ ) is ( $\pi \approx 3$ )A$1.2 \times 10^7$B$3 \times 10^6$C $6 \times 10^6$D $2.4 \times 10^7$Check AnswerClear SelectionReveal AnswerShow Explanation
