Power in Circuits Video Lessons

Video Thumbnail

Concept

Problem: A 1500-W heater is designed to be plugged into a 120-V outlet.(a) What current will flow through the heating coil when the heater is plugged in?(b) What is R, the resistance of the heater?(c) How long does it take to raise the temperature of the air in a good-sized living room (3.00m × 5.00m × 8.00m) by 10.0 °C? Note that the specific heat of air is 1006 J/(kg • °C) and the density of air is 1.20 kg/m3.

FREE Expert Solution

(a) 

I=PV

P = 1500 W and I = 120 V.

Substituting:

88% (72 ratings)
View Complete Written Solution
Problem Details

A 1500-W heater is designed to be plugged into a 120-V outlet.

(a) What current will flow through the heating coil when the heater is plugged in?

(b) What is R, the resistance of the heater?

(c) How long does it take to raise the temperature of the air in a good-sized living room (3.00m × 5.00m × 8.00m) by 10.0 °C? Note that the specific heat of air is 1006 J/(kg • °C) and the density of air is 1.20 kg/m3.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Power in Circuits concept. You can view video lessons to learn Power in Circuits. Or if you need more Power in Circuits practice, you can also practice Power in Circuits practice problems.