Explanation: Ohm's Law describes the fundamental relationship between voltage (E, in volts), current (I, in amperes), and resistance (R, in ohms) in an electrical circuit. The initial and most commonly stated form is E = IR, which means voltage is equal to current multiplied by resistance. However, because this is an algebraic equation, it can be rearranged to solve for any of the three variables if the other two are known. * **I = E / R** is derived by dividing both sides of E = IR by R, allowing you to calculate current if voltage and resistance are known. * **R = E / I** is derived by dividing both sides of E = IR by I, allowing you to calculate resistance if voltage and current are known. All three equations represent the same underlying physical principle of Ohm's Law, just expressed differently to suit the specific variable you need to find. Therefore, they are all correct statements of Ohm's Law.