Final answer:
None of the options provided is correct.
Step-by-step explanation:
The subject of the question relates to the electrical principles governing current, voltage, and resistance, which are fundamental concepts in Physics. Ohm's law states the relationship between these quantities and is expressed mathematically as V = IR. To find the equivalent expression when current is represented by C, voltage by B, and resistance by g, we merely substitute the corresponding variables into Ohm's law.
Using this substitution, the correct equation representing Ohm's law in these new variables would be B = Cg, since B represents voltage (V), C represents current (I), and g represents resistance (R). Therefore, the mathematical expression for Ohm's law in these terms would be option d: B = Cg.
Understanding Ohm's law allows for the manipulation of the equation to solve for any one variable given the other two. This is important when analyzing electrical circuits and understanding how changes in voltage, resistance, or current affect one another.