What is the current in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms?

What is the current in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms?

• A. 1.5 amperes
• B. 2 amperes
• C. 3 amperes
• D. 4 amperes

Answer: (A)

To determine the current flowing in a circuit, you can apply Ohm's Law, which states that Voltage (V) = Current (I) × Resistance (R). Rearranging this formula to find current gives you I = V / R. In this scenario, the applied voltage is 120 volts, and the resistance is 80 ohms. Following the calculation: I = 120 volts / 80 ohms = 1.5 amperes. This result shows that when there's a voltage of 120 volts across a resistance of 80 ohms, the current running through the circuit is 1.5 amperes. This understanding of Ohm's Law is crucial for analyzing basic electrical circuits in various applications, including those common in amateur radio operations.

To determine the current flowing in a circuit, you can apply Ohm's Law, which states that Voltage (V) = Current (I) × Resistance (R). Rearranging this formula to find current gives you I = V / R.

In this scenario, the applied voltage is 120 volts, and the resistance is 80 ohms. Following the calculation:

I = 120 volts / 80 ohms = 1.5 amperes.

This result shows that when there's a voltage of 120 volts across a resistance of 80 ohms, the current running through the circuit is 1.5 amperes. This understanding of Ohm's Law is crucial for analyzing basic electrical circuits in various applications, including those common in amateur radio operations.