Ohm's Law formula

Ohm's Law formula

• A. Volts = current times resistance (V=IR)
• B. Current = Voltage divided by Resistance (I = V / R)
• C. Power = Voltage times Current (P=VI)
• D. Resistance = Voltage divided by Current (R=V/I)

Answer: (B)

Current is determined by how much voltage pushes through a resistance. Ohm's law gives the direct way to quantify that: current equals voltage divided by resistance. This form is the simplest and most straightforward way to calculate how much current will flow when you know the voltage across a component and its resistance. For example, with 12 volts across a 4-ohm resistor, the current is 12 divided by 4, which equals 3 amperes. Other common expressions of Ohm's law exist, such as voltage being the product of current and resistance (V = IR) or resistance being voltage divided by current (R = V / I); these are simply rearrangements of the same relationship. There’s also the power formula P = VI, which ties voltage and current to electrical power but doesn’t give current directly. So the form I = V / R is the direct, most applicable expression for finding current.

Current is determined by how much voltage pushes through a resistance. Ohm's law gives the direct way to quantify that: current equals voltage divided by resistance. This form is the simplest and most straightforward way to calculate how much current will flow when you know the voltage across a component and its resistance. For example, with 12 volts across a 4-ohm resistor, the current is 12 divided by 4, which equals 3 amperes.

Other common expressions of Ohm's law exist, such as voltage being the product of current and resistance (V = IR) or resistance being voltage divided by current (R = V / I); these are simply rearrangements of the same relationship. There’s also the power formula P = VI, which ties voltage and current to electrical power but doesn’t give current directly. So the form I = V / R is the direct, most applicable expression for finding current.