Which expression represents the formula to solve for current in Ohm's law?

Which expression represents the formula to solve for current in Ohm's law?

• A. I = E * R
• B. I = E / R
• C. I = R / E
• D. I = E - R

Answer: (B)

Ohm's law tells us how current, voltage, and resistance relate: current equals voltage divided by resistance. Since voltage V equals IR, solving for current I gives I = V/R. If the problem uses E to denote voltage, that becomes I = E/R. This matches the units as well: volts divided by ohms yields amperes. The other forms would multiply, divide in the wrong order, or subtract, which isn’t how Ohm’s law links these quantities.

Ohm's law tells us how current, voltage, and resistance relate: current equals voltage divided by resistance. Since voltage V equals IR, solving for current I gives I = V/R. If the problem uses E to denote voltage, that becomes I = E/R. This matches the units as well: volts divided by ohms yields amperes. The other forms would multiply, divide in the wrong order, or subtract, which isn’t how Ohm’s law links these quantities.