The electrical resistance r of a wire varies directly with its length l and inversely with the square of its diameter d. If 200 m of wire with diameter 6 mm has a resistance of 16 ohms, what is the resistance of 300 m of wire with a diameter of 8 mm?

Question

anonymous · Answer

r is the resistance
k is the constant
l is the length
d is the diameter.

r = k*l

r = (1/k)*(d^2)

anonymous · Answer

Thank you so much! I really appreciate it. I was lost. Lol.

anonymous · Answer

your welcome.