Question

If a circuit is connected across a 120-V battery and has a resistance of 285 Ω, what is the current through the circuit and the power dissipated by the circuit?

Answer 1

50.5 W

Step-by-step explanation:

Using Ohm's Law, we can find the current through the circuit:

I = V/R

where I is the current, V is the voltage, and R is the resistance.

Substituting the given values, we get:

I = 120 V / 285 Ω

I ≈ 0.421 A

So the current through the circuit is approximately 0.421 A.

The power dissipated by the circuit can be found using the formula:

P = VI

where P is power, V is voltage, and I is current.

Substituting the given values, we get:

P = 120 V × 0.421 A

P ≈ 50.5 W

So the power dissipated by the circuit is approximately 50.5 W.