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Two rods are joined end to end as shown....

Two rods are joined end to end as shown. Both have a cross-sectional area of` 0.01 cm^2`. Each is 1 m long. One rod is a copper with resistivity of` 1.7x10^-6` ohm -centimetre, 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?

A

0.117 V

B

0.00145 V

C

0.0145 V

D

`1.7 xx 10^-6` V

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