calculate the resistance of 2m long nichrome wire of radius 0.321mm. resistivity of nichrome is 15x10-6 ohm m. if the potential difference of 10v is applied across this wire, what will be the current in the wire?
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as we know the formula for resistance:- R=rho L/A
given:- length=2m
radius=0.321mm=0.000321m
resistivity=15x10-6 ohm m
potential difference=10V
putting these values in formula
R=15x10-6 x 2/3.14x0.000321x0.000321
R= 9.3 ohm
to find the value of current:- R=V/I
9.3=10/I
I=10/9.3
I=1.08A
hope it is clear........
given:- length=2m
radius=0.321mm=0.000321m
resistivity=15x10-6 ohm m
potential difference=10V
putting these values in formula
R=15x10-6 x 2/3.14x0.000321x0.000321
R= 9.3 ohm
to find the value of current:- R=V/I
9.3=10/I
I=10/9.3
I=1.08A
hope it is clear........
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