Question

Two rods are joined end to end, as shown. Both have a
cross-sectional area of 0.01 cm². Each is 1 meter long. One
rod is of copper with a resistivity of 1.7 × 10⁻⁶ ohm-centimeter,
the other is of iron with a resistivity of 10⁻⁵ ohm-centimeter.
How much voltage is required to produce a current of 1
ampere in the rods? [NEET Kar. 2013]
(a) 0.117 V (b) 0.00145 V
(c) 0.0145 V (d) 1.7 × 10⁻⁶ V

Answer 1

option a is correct..

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