Question 6A26

Ohm's Law is a fundamental principle describing the relationship between voltage, current, and resistance (or impedance in AC circuits). For alternating current (AC) circuits: * **E** represents voltage, measured in volts. * **I** represents current, measured in amperes. * **Z** represents impedance, measured in ohms (not volts, as stated in the question). The core relationship is **E = I * Z**, meaning voltage equals current multiplied by impedance. All three options presented are simply algebraic rearrangements of this fundamental formula: * **A) I = E/Z**: Dividing both sides of E = IZ by Z yields current (I) as voltage divided by impedance. * **B) E = IZ**: This is the primary statement of Ohm's Law for AC circuits, directly defining voltage. * **C) Z = E/I**: While written as "Z = Z/I" in the option, this is almost certainly a typographical error and intended to be Z = E/I. If so, it's another valid rearrangement, solving for impedance (Z) as voltage divided by current. Since options A, B, and the *intended* C are all mathematically equivalent expressions of Ohm's Law for AC, "All of the above" is the correct choice.