Jump to content
Electronics-Lab.com Community

Confussing Loading Computation


Guest urbanmiles

Recommended Posts

Guest urbanmiles

Hi Everyone , i have this simple setup of mine and i want to know how can i compute the total loading of this setup:

the siren is rated 12V 15W and i connected it with a 12V 1A Adapter and it works just fine .

i know that P=IV then I=P/V

but im confused if the siren is really consuming 15W knowing that the adapter is only generating 12V x 1A =12Watts, right ?

and from the rating given, 12V 15W, so here the current must be 15/12 = 1.25A , but the adapter is giving only 1A,

how can i compute for the correct wattage and current consumed by the siren when connected with a 12v 1A adapter? tnx!

post-113614-14279144682969_thumb.png

Link to comment
Share on other sites


Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   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.

Loading...
×
  • Create New...