What is the equation Rt = Et / It used to solve for what quantity?

What is the equation Rt = Et / It used to solve for what quantity?

• A. The power
• B. The current
• C. The voltage
• D. The resistance

Answer: (D)

This uses Ohm's law rearranged to solve for resistance. Ohm's law is V = IR, so solving for R gives R = V / I. In the equation, Rt is the resistance, Et is the voltage across the component, and It is the current through it. If you know the voltage and the current, you can determine how much resistance there is. The units check out as volts per ampere, which is the ohm. This shows you’re solving for resistance, not for power, current, or voltage (which would be found or expressed with different formulas).

This uses Ohm's law rearranged to solve for resistance. Ohm's law is V = IR, so solving for R gives R = V / I. In the equation, Rt is the resistance, Et is the voltage across the component, and It is the current through it. If you know the voltage and the current, you can determine how much resistance there is. The units check out as volts per ampere, which is the ohm. This shows you’re solving for resistance, not for power, current, or voltage (which would be found or expressed with different formulas).