1.

A nichrome wire 50 cm long and one square millimetre cross-section carries a current of 4A when connected to a 2V battery.  The resistivity of nichrome wire in ohm metre is [EAMCET 2001]

A.            1 × \[{{10}^{-6}}\]
B.                                      4 × \[{{10}^{-7}}\]
C.            3 × \[{{10}^{-7}}\]              
D.            2 × \[{{10}^{-7}}\]
Answer» B.                                      4 × \[{{10}^{-7}}\]


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