Question

How many amperes are flowing in a circuit when the applied voltage is 12 volts DC and the load is 120 watts?

a) 0.1 A
b) 1 A
c) 10 A
d) 12 A

Answer 1

To find the current flowing in the circuit when the applied voltage is 12 volts DC and the load is 120 watts, we can use Ohm's Law. The current is 10 A.

Step-by-step explanation:

To find the current flowing in a circuit, you can use Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). In this case, we are given the applied voltage (12 volts) and the power dissipated by the load (120 watts).

First, we need to find the resistance. Using the formula power (P) equals voltage (V) squared divided by resistance (R), we can rearrange it to find resistance: R = V^2 / P. Plugging in the values, we get R = 12^2 / 120, which simplifies to R = 1.2 ohms.

Now, we can use Ohm's Law to find the current. I = V / R, so I = 12 / 1.2, which equals 10 amperes (A).