State Ohm's Law with its formula.

State Ohm's Law with its formula.

• A. V = I × R
• B. V = I / R
• C. I = V × R
• D. R = V × I

Answer: (A)

Voltage, current, and resistance are connected by Ohm's Law. The expression V = I × R shows that the voltage across a component equals the current through it times its resistance. This makes sense because voltage is what pushes charges, current is how many charges pass per second, and resistance tells how hard it is for charges to move. The units line up: volts equal amperes times ohms, since 1 Ω = V/A. For instance, with 2 A flowing through a 5 Ω resistor, the voltage is 10 V. If you know voltage and resistance, you can find current with I = V / R, and if you know voltage and current you can find resistance with R = V / I.

Voltage, current, and resistance are connected by Ohm's Law. The expression V = I × R shows that the voltage across a component equals the current through it times its resistance. This makes sense because voltage is what pushes charges, current is how many charges pass per second, and resistance tells how hard it is for charges to move. The units line up: volts equal amperes times ohms, since 1 Ω = V/A. For instance, with 2 A flowing through a 5 Ω resistor, the voltage is 10 V. If you know voltage and resistance, you can find current with I = V / R, and if you know voltage and current you can find resistance with R = V / I.