Jump to content
Sign in to follow this  
  • entries
  • comments
  • views

Fuse vs. Circuit Breaker

Sign in to follow this  


If you live in a house like mine, blowing fuses and circuit breakers is a common occurrence because of all the things we have plugged in at once.

A fuse is a small, thin conductor that is designed to separate whenever there is excessive current flowing through the circuit. Fuses are connected in series so that when the fuse blows it will stop current flow throughout the entire circuit. If fuses were connected in parallel, they would not affect the current through any of the other branches. Although fuses are designed to stop all the current flowing through the circuit, sometimes if the voltage is high enough and the fuse isn’t long enough a spark can jump from one end of the wire to the other, allowing some current through and completing the circuit once again (which would not be good at all). Once a fuse is blown, it needs to be discarded and replaced with a new one.

A circuit breaker is a switch that automatically opens to interrupt the current flowing through the circuit. When the circuit breaker is on, it allows the current to pass through the circuit. However, when the current becomes too excessive, a strong magnetic force flips the metal lever within the circuit breaker and stops the current from flowing. Unlike fuses, when a circuit breaker is tripped, it can simply be turned back on from the breaker box allowing the circuit to reconnect.

Related imageImage result for fuse vs circuit breaker

Sign in to follow this  


Recommended Comments

There are no comments to display.

Add a comment...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Terms of Use

The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.

Copyright Notice

APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to info@aplusphysics.com. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.

  • Create New...