Question

Rearrange the formula I = √P/R for R.

A) R = P/I²
B) R = (P/I)
C) R = P²/I
D) R = (P/I)²

Answer 1

A) R = P/I²

Explanation:

I = √P/R

Square each side

I^2 = (√P/R)^2

I^2 = P/R

Multiply each side by R

I^2R =P/R * R

I^2R = P

Divide by I^2

I^2R / I^2 = P/ I^2

R = P/ I^2