How much power is being used in a circuit when the applied voltage is 13.8 volts DC and the current is 10 amperes?

How much power is being used in a circuit when the applied voltage is 13.8 volts DC and the current is 10 amperes?

• A. 138 watts
• B. 0.7 watts
• C. 23.8 watts
• D. 3.8 watts

Answer: (A)

To determine the power used in a circuit, one can use the formula that relates power (P), voltage (V), and current (I): \[ P = V \times I \] In this case, the voltage applied across the circuit is 13.8 volts, and the current flowing through the circuit is 10 amperes. Plugging these values into the formula yields: \[ P = 13.8 \, \text{volts} \times 10 \, \text{amperes} = 138 \, \text{watts} \] Therefore, the power being used in the circuit is 138 watts. This calculation reflects the direct relationship between voltage, current, and power in a DC circuit, where the power is simply the product of these two electrical properties. The other options presented do not align with the computations based on the given voltage and current parameters, which leads us to confidently conclude that 138 watts is the correct determination of power in this situation.

To determine the power used in a circuit, one can use the formula that relates power (P), voltage (V), and current (I):

[ P = V \times I ]

In this case, the voltage applied across the circuit is 13.8 volts, and the current flowing through the circuit is 10 amperes. Plugging these values into the formula yields:

[ P = 13.8 , \text{volts} \times 10 , \text{amperes} = 138 , \text{watts} ]

Therefore, the power being used in the circuit is 138 watts. This calculation reflects the direct relationship between voltage, current, and power in a DC circuit, where the power is simply the product of these two electrical properties.

The other options presented do not align with the computations based on the given voltage and current parameters, which leads us to confidently conclude that 138 watts is the correct determination of power in this situation.