Question

if current of 10 Milli ampere flows through a conducting wire and a potential difference of 2.5 volt is produced at its ends calculate the resistance of the conducting wire

Answer 1

firstly , make a point that you convert mA into Ampere by simple method and then by applying the formula of R = V/ I.

I have just provided the formula I think you should do the calculation on your own.

I hope this will help you

study well

Answer 2

V=I/R
I= mA=10=0.01A
V=2.5V
2.5=0.01/R
2.5×R=0.01
R= 0.01/2.5
R=0.004 ohm

hope it helps.
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