PhysicsNEET 2022Ohm's law, resistivity, temperature dependence

Current Electricity

A copper wire of length 10 m and radius $(\frac{1 0 ^{- 2}}{π})$ m has electrical resistance of $10Ω$ . The current density in the wire for an electric field strength of 10 V/m is:

A. $1 0^{5} A/ m^{2}$ ✓
B. $1 0^{4} A/ m^{2}$
C. $1 0^{6} A/ m^{2}$
D. $1 0^{- 5} A/ m^{2}$

You have the answer. The worked solution — and why the other three were written — is part of a paid pack.

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From Physics › Current Electricity › Ohm's law, resistivity, temperature dependence — lectures, notes and every past question on it.

Last revised 7 Sept 2026. Found a mistake? Tell us — corrections are the fastest thing we act on.

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