This is a suggested relationship between L/R and L
L/R = kl + A/P
P is the resistivity, A is the cross-sectional area and k is the constant for the circuit
Using the value of the y-intercept find a value for P with the appropriate unit
The graph of L/R against L had the intercept of...
Thanks for the help guys! :)
I'm pretty sure the diameter was in millimeters.
In my final answer? 8
I couldn't fit it all in the answer box, lol. Standard form was the only way :(
I measured the diameter of a wire and got 0.30. This is in millimeters right?
How would you calculate the cross sectional area? Is it just Πr²?
so Π x (0.15x10⁻³ x 0.15x10⁻³)
= 7.0 x 10⁻⁸m²
Is this right?