Question

A lamp is plugged into a standard 120-volt outlet. If the lamp draws a current of 0.5-amps, how much energy is consumed in 1 minute?

A) 3600 joules


B) 240 joules


C) 60 joules


D) 1 joule

Answer 1

A. 3,600 Joules

Step-by-step explanation:

USA Test prep

Answer 2

First, we can calculate the power used by the lamp, which is given by the product between the voltage and the current:

`P=VI=(120 V)(0.5 A)=60 W`

Now, we know that the energy used is the product between the power and time. The time interval is 1 minute, which corresponds to 60 s, therefore the energy used during this time is

`E=Pt=(60 W)(60 s)=3600 J`

Therefore, A) is the correct answer.