What is the resistance of a circuit that draws 4 amperes from a 12-volt source?

What is the resistance of a circuit that draws 4 amperes from a 12-volt source?

• A. 3 ohms
• B. 16 ohms
• C. 48 ohms
• D. 8 ohms

Answer: (A)

To determine the resistance of a circuit from the given current and voltage, you can use Ohm’s Law, which states that Voltage (V) = Current (I) × Resistance (R). Rearranging the formula to find resistance gives you R = V / I. In this scenario, the voltage is 12 volts, and the current is 4 amperes. Plugging those values into the formula provides: R = 12 V / 4 A = 3 ohms. This calculation shows that the resistance of the circuit is 3 ohms. Understanding how to apply Ohm's Law is crucial in electronics, as it helps you analyze and design circuits effectively.

To determine the resistance of a circuit from the given current and voltage, you can use Ohm’s Law, which states that Voltage (V) = Current (I) × Resistance (R). Rearranging the formula to find resistance gives you R = V / I.

In this scenario, the voltage is 12 volts, and the current is 4 amperes. Plugging those values into the formula provides:

R = 12 V / 4 A = 3 ohms.

This calculation shows that the resistance of the circuit is 3 ohms. Understanding how to apply Ohm's Law is crucial in electronics, as it helps you analyze and design circuits effectively.