Using Ohm’s law, if a circuit has a current of 4 A and a resistance of 55 ohms, what is the voltage?

To find the voltage in a circuit when the current and resistance are known, you can apply Ohm's Law, which is defined as V = I × R. In this equation:

• V represents voltage (in volts).

• I represents current (in amperes).

• R represents resistance (in ohms).

In the given scenario, the current (I) is 4 A and the resistance (R) is 55 ohms. By substituting these values into the formula, you perform the following calculation:

V = 4 A × 55 ohms = 220 V.

This shows that the correct voltage for the circuit is 220 volts. This approach accurately utilizes Ohm’s Law, demonstrating how the relationship between current, resistance, and voltage can be mathematically expressed and calculated.