Question

The resistance (R) in a wire increases when the length of the wire (L) increases. Write the correct equation for this scenario, and solve for when the length is 1.

Length Resistance
10 2
15 3

R = 20 / L; R = 20

R = .2L; R = 5

R = .2L; R = .2

R = 20 / L; R = 5

Answer 1

@Whitemonsterbunny17

Answer 2

"Resistance (R) in a wire increases when the length of the wire (L) increases" implies
R is proportional to L . That is, R = k * L where k is a constant.
It is given that when L = 10, R = 2. Substitute these values and find k.

Answer 3

ok i got B

Answer 4

R = k * L -- (1)
When L = 10, R = 2
2 = k * 10
find 'k'
Then they ask for R when L = 1. Put the k value you find and L = 1 in equation (1) and find R.

Answer 5

ohhhh ok nevermind its A

Answer 6

thank you really do appreciate it

Answer 7

That is not the correct answer.

Answer 8

what? if its not A then it has to be D

Answer 9

R = k * L -- (1)
When L = 10, R = 2. Substitute.
2 = k * 10
divide by 10
2/10 = k
k = 0.2
R = 0.2L
when L = 1, R = 0.2 * 1 = 0.2
Answer: R = 0.2L and R = 0.2

Answer 10

wow im stupid. i get it now. thanks for explainging it

Answer 11

yw.