Closed Circuit

[JA]

Hi,

My niece has a question on her homework, and we can't find an answer
anywhere! She's only 10, so it should be a fairly simple question -if you
know anything about circuits, which I don't!

What is needed for a closed circuit?

I appreciate any help!

Jill~

 

[DaveM]

"JA" <jarmour@kc.rr.com> wrote in message
news:45f4a47f$0$5815$4c368faf@roadrunner.com...

Hi,

My niece has a question on her homework, and we can't find an answer anywhere!
She's only 10, so it should be a fairly simple question -if you know anything
about circuits, which I don't!

What is needed for a closed circuit?

I appreciate any help!

Jill~

If you're asking about electrical circuits, you need a complete loop from power
source through a load and back to the power source. Below is a diagram of a
closed loop circuit:

Please view in a fixed-width font such as
Courier.

/
+--------/ ----------+
| Switch |
| |
+-+-+ *****
| | * *
| | * *
Battery | | ***** Lamp
| | |
+-+-+ |
| |
| |
+---------------------+

The loop is formed by the ability of the current from the battery to flow from
its positive terminal through the closed switch, through the lamp (the lamp
glows) and back to the negative terminal of the battery. Note that if the
switch is opened, the loop is opened and no current can flow, and the lamp will
not glow.

If you're talking about closed circuit TV systems, that means that connections
(the connections may be wired or wireless) from the camera goes only to the TV
receivers that are connected to the camera. It's intended for security systems,
etc., where the TV signals are not intended for broadcasting to the public; in
other words, intended only for private use.

--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in the
address)

Life is like a roll of toilet paper; the closer to the end, the faster it goes.