Download presentation

Presentation is loading. Please wait.

Published byDanny Blackshaw Modified over 2 years ago

2
Fuses and Circuit Breakers are switches that act as safety devices ◦ Addition of appliances reduces the resistance and increases the current ◦ Energy produced enough to melt wires

3
Fuse ◦ Short piece of metal that melts ◦ Thickness is determined by amount of current Circuit Breaker ◦ A Switch that opens and stops current flow when too much has gone through

4
There are 10 ohm, 20 ohm, and 60 ohm appliances connected in parallel in a house. A 15 A fuse is connected in series with the power source for the appliances. Will the fuse blow if all appliances are operated at once?

5
Equivalent resistance of the appliances (1/R) = (1/10Ω) + (1/20 Ω) + (1/60 Ω) = 1/6 Ω = 6 Ω Find Current of appliances I = V/R = 120 V / 6 Ω = 20 A

6
Short circuit starts when there is a very low resistance If there is a low resistance, what is very large? Current Will start a fire in some cases

7
Find any parallel resistors. And find the equivalent resistance between them Now find the equivalent resistance with the other resistors that are in series Narrow this down until you get one total resistance through a circuit and go backwards to find the current and voltage along single resistors

Similar presentations

OK

PS-6.9: compare the functioning of simple series and parallel electrical circuits PS-6.10: compare alternating current and direct current in terms of the.

PS-6.9: compare the functioning of simple series and parallel electrical circuits PS-6.10: compare alternating current and direct current in terms of the.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on cross-sectional study design Ppt on disaster management project Ppt on different types of computer softwares available Ppt on environmental issues Ppt on water pollution for class 9 Ppt on natural numbers whole numbers Free download ppt on report writing Weekends by appt only Ppt on saas business model Download ppt on diversity in living organisms for class 9