What does Ohm's law express the relationship between?

What does Ohm's law express the relationship between?

• A. Current, voltage, and resistance
• B. Power, energy, and time
• C. Charge, capacitance, and resistance
• D. Voltage, current, and inductance

Answer: (A)

Ohm's law shows how voltage, current, and resistance relate in an electrical conductor. It states that voltage across a component equals current times its resistance (V = IR). This means the voltage provides the push that drives charges, creating current, while resistance resists that flow. If resistance stays the same and you raise the voltage, the current increases proportionally; if you increase resistance with the same voltage, the current drops. If the resistance changes, the current changes in inverse proportion to the new resistance. Other choices mix in quantities that aren’t tied to this direct linear relationship. Power, energy, and time involve P = VI and E = Pt, which describe how much energy or power is involved rather than the straightforward V–I–R link. Charge, capacitance, and resistance relate to RC behavior and charging dynamics, not the simple proportional connection. Voltage, current, and inductance point to inductors where V = L di/dt, which depends on changing current over time, not the steady V = IR relationship.

Ohm's law shows how voltage, current, and resistance relate in an electrical conductor. It states that voltage across a component equals current times its resistance (V = IR). This means the voltage provides the push that drives charges, creating current, while resistance resists that flow. If resistance stays the same and you raise the voltage, the current increases proportionally; if you increase resistance with the same voltage, the current drops. If the resistance changes, the current changes in inverse proportion to the new resistance.

Other choices mix in quantities that aren’t tied to this direct linear relationship. Power, energy, and time involve P = VI and E = Pt, which describe how much energy or power is involved rather than the straightforward V–I–R link. Charge, capacitance, and resistance relate to RC behavior and charging dynamics, not the simple proportional connection. Voltage, current, and inductance point to inductors where V = L di/dt, which depends on changing current over time, not the steady V = IR relationship.