Ohm's law can be expressed by the formula i = e/r. From this formula, find the formula

Question

Ohm's law can be expressed by the formula i = e/r. From this formula, find the formula for resistance r.

A.r = e/i

B.r = ie

C.r = i + e

D.r = i/e

Answer 1

You just want to solve for the other variable algebraically!

So we've been given

I = E/R and want to solve that for R

I(R) = E

R = E/I

meaning that choice A looks like the best option out of the list

Answer 2

This is an algebraic problem, take the formula i=e/r and solve for r.

i=e/r  *multiply both sides by r

ir=e   *divide both sides by i

r=e/i, Choice A.

 

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