Ok, thanks CWatters, so what's the solution to the problem? Obviously the buzzer won't sound with the lid switch open as it is a series circuit, if I am right.
Thanks,
Sarah
Ok, I'm afraid I don't have time to draw and attach/scan - it's already evening here (Kenya), my work day is over and my elementary scholarship class starts at 7am tomorrow. I'd really like to do it with them if I can get an answer to this question tonight.
Watters - the voltage will be nil...
I can't draw it on these forums can I? I am a first year teacher who hasn't done physics for 16 years. I want to go through this with my class tomorrow. If you could guide me then I will be able to understand it. Thanks.
I can't answer Q3 of:
A spin-drier has a start-stop switch, but the motor will only spin the drum if the lid is closed. Closing the lid closes an SPST switch inside the machine, and the motor can then be started with the start-stop switch.
2) Draw a diagram of a simple circuit for this...