Question

A light bulb has 240 Ω of resistance when connected to a 120 V electrical socket. What is the current through the light bulb? (AKS 8b)

Question 36 options:

2.0 A


1.0 A


0.50 A


0.20 A

Answer 1

0.50 A

Step-by-step explanation:

We can find the current from this through Ohm's Law:

V = IR

Now, in it's original form, we're only looking for Voltage. However, we can switch this formula around to find each part of it:

I = V / R (current)

R = V / I (resistance)

In this case, we'll use the formula for current:

V = 120 V

R = 240 Ω

I = ?

I = 120 / 240

I = 0.5 A