S Splash1 New Member Dec 31, 2008 #1 We always connect one end of the circuit to a positive pole and the other end to the negative pole of the battery. But... When I connect 2 negatives poles or 2 positives poles using the next configuration... The motor works and the light bulb shines. ONE END OF THE LIGHT BULB -(battery1)+-(battery2)++(battery3)- SECOND END OF THE LIGHT BULB As you can see, the light bulb is connected to 2 NEGATIVE poles... Why can I light a light bulb using 2 (negative or positive) poles?
We always connect one end of the circuit to a positive pole and the other end to the negative pole of the battery. But... When I connect 2 negatives poles or 2 positives poles using the next configuration... The motor works and the light bulb shines. ONE END OF THE LIGHT BULB -(battery1)+-(battery2)++(battery3)- SECOND END OF THE LIGHT BULB As you can see, the light bulb is connected to 2 NEGATIVE poles... Why can I light a light bulb using 2 (negative or positive) poles?
Nigel Goodwin Super Moderator Most Helpful Member Dec 31, 2008 #2 You've got three batteries, two cancel each other out, so you're running off just ONE battery.
crutschow Well-Known Member Most Helpful Member Dec 31, 2008 #3 As Nigel stated if you measure the voltage you'll see the voltage of one battery.