State Ohm's Law as it applies to basic electrical circuits.

State Ohm's Law as it applies to basic electrical circuits.

• A. Current equals voltage plus resistance
• B. Resistance equals voltage minus current
• C. Power equals voltage times current
• D. Voltage equals current times resistance

Answer: (D)

Ohm's Law in a basic circuit shows how voltage, current, and resistance relate to each other through a simple product. The voltage across a conductor equals the current flowing through it times its resistance: V = I × R. This means if you know the resistance and the current, you can multiply them to get the voltage; if you know the voltage and the resistance, you can divide to find the current. The product IR has the unit of volts, reflecting how the ability to push current (voltage) depends on how strongly the material resists that flow (resistance). The other ideas in the options don’t describe this direct relationship. Adding voltage and resistance isn’t how voltage is determined; subtracting them isn’t either. The option about power, P = V × I, is related and often derived from Ohm’s Law (by substituting V with IR), but it describes electrical power, not the fundamental voltage–current–resistance relationship.

Ohm's Law in a basic circuit shows how voltage, current, and resistance relate to each other through a simple product. The voltage across a conductor equals the current flowing through it times its resistance: V = I × R. This means if you know the resistance and the current, you can multiply them to get the voltage; if you know the voltage and the resistance, you can divide to find the current. The product IR has the unit of volts, reflecting how the ability to push current (voltage) depends on how strongly the material resists that flow (resistance).

The other ideas in the options don’t describe this direct relationship. Adding voltage and resistance isn’t how voltage is determined; subtracting them isn’t either. The option about power, P = V × I, is related and often derived from Ohm’s Law (by substituting V with IR), but it describes electrical power, not the fundamental voltage–current–resistance relationship.