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Question

A wire 50 cm long and 1 mm2 in cross-section carries a current of 4 A when connected to a 2 V battery. The resistivity of the wire is
  1. 2×107Ωm
  2. 5×107Ωm
  3. 4×106Ωm
  4. 1×106Ωm

A
2×107Ωm
B
4×106Ωm
C
1×106Ωm
D
5×107Ωm
Solution
Verified by Toppr

By Ohm's law, resistance can be found from current and voltage as below.
R=VI

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