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PhysicsJEE Main 22 Jan 2026, Shift 2·Q24·Numerical·Easy–moderate

Current Electricity · Current and resistance

A cylindrical conductor of length 2 m and area of cross-section 0.2 mm20.2\ \mathrm{mm^2} carries an electric current of 1.6 A when its ends are connected to a 2 V battery. Mobility of electrons in the conductor is α×10−3 m2/V.s\alpha\times10^{-3}\ \mathrm{m^2/V.s}. The value of α\alpha is : (electron concentration =5×1028/m3= 5\times10^{28}/\mathrm{m^3} and electron charge =1.6×10−19= 1.6\times10^{-19} C)

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