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Problem

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31 Oct 2021

Given information

It is given that the two wires, one of copper followed by aluminum, each of diameter 1.4 mm and length 5 m are connected in series. A voltage difference of 95 mV is applied across the composite wire. It is also known that the resistivity of copper and aluminum are respectively    and   

The net resistance of the combination is   

The current through both wires is   

Step-by-step explanation

Step 1.

 

The Ohm’s law tells that the ratio of voltage drop (V) and the current (I) passing through a resistance (R) is ideally constant which is equal to the value of that resistance itself, i.e

 V=IR

 

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