When a voltage difference is applied to a piece of metal wire, a 10.0 mA current flows through it. If this metal wire is now rep
1 answer:
Answer:
10 mA
Explanation:
We have given when a potential difference is applied then a current of 10 mA is flows so current i = 10 mA
According to ohms law voltage V =i R
And resistance is given as
From the relation it is clear that resistance is inversely proportional to the area
As in new case the wire have twice diameter means 4 times the area so the resistance will decrease by 4 times from the previous resistance
As current current is inversely proportional to resistance so current will become 4 times of previous value
So current = 10×4=40 mA
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