Which formula represents Ohm's Law for calculating current?

Which formula represents Ohm's Law for calculating current?

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

Answer: (B)

Current is how much charge flows per second, and Ohm’s Law links this to the voltage and the resistance in a simple way: current equals voltage divided by resistance. This means pushing more voltage pushes more current, while increasing resistance pushes current down. For example, if you have 12 volts across a 6 ohm resistor, the current is 12 divided by 6, which equals 2 amperes. The division form correctly reflects the inverse relationship with resistance and the direct relationship with voltage. The expression that multiplies voltage by resistance would imply current grows with resistance, which isn’t how circuits behave. The form that flips the ratio to resistance over voltage would invert the relationship and yield incorrect current values. The division can be written with a slash or with the symbol ÷; both express the same idea, so they’re just different notations for the same principle.

Current is how much charge flows per second, and Ohm’s Law links this to the voltage and the resistance in a simple way: current equals voltage divided by resistance. This means pushing more voltage pushes more current, while increasing resistance pushes current down.

For example, if you have 12 volts across a 6 ohm resistor, the current is 12 divided by 6, which equals 2 amperes. The division form correctly reflects the inverse relationship with resistance and the direct relationship with voltage.

The expression that multiplies voltage by resistance would imply current grows with resistance, which isn’t how circuits behave. The form that flips the ratio to resistance over voltage would invert the relationship and yield incorrect current values. The division can be written with a slash or with the symbol ÷; both express the same idea, so they’re just different notations for the same principle.