Download presentation

Presentation is loading. Please wait.

Published byPaige MacLean Modified over 4 years ago

1
11.4 The Rate at Which Energy is Used

2
We use electrical power every day in many different ways. What is power? Power is how rapidly an appliance uses up electrical energy. Different electrical loads use different amounts of power Ex. A 300w bulb uses up 3 times as much electrical energy as a 100w bulb. The Rate at Which Energy is Used

3
Calculating Power We can calculate how much power a device uses with a simple equation. The symbol for electrical power is P. The unit for power is the watt (W). Power = Voltage Drop x Current P= V x I

4
PVIPVI The Power Triangle Just like with Ohms Law, we can use a triangle to help us remember the different formulae we need. P = V x I V = P I I = P V

5
Calculate the power of a vacuum cleaner if the operating voltage is 120v, and the current flowing through it when it is used is 7.90A. P= ? W V= 120V I= 7.90A P = V x I P = 120V x 7.9A P = 948 W The power used by the vacuum cleaner is 948W

6
Calculate the voltage of a computer that has 600W of power and 1.9A flowing into the monitor. P = 600W V = ? I = 1.9A V = P I V = 600W 1.9A V = 316V The voltage would be 316V.

Similar presentations

Presentation is loading. Please wait....

OK

Circuits & Electronics

Circuits & Electronics

© 2018 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google

Ppt on indian railway reservation system Ppt on horizontal axis wind turbine Ppt on hong kong tourism Ppt on classical economics assumptions Ppt on email etiquettes Ppt on face recognition project Ppt on soft skills for bpo Ppt on new stone age Ppt on indian sign language Ppt on panel discussion invitation