For example, when you put two AA batteries into a device the + and - ends of the batteries are facing away from each other. Why is it done this way? I'm sure I learned this at some point but I've since forgotten and I started wondering about it last night.
Thanks!
2006-08-01 06:32:12 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
Imagine the electrons have to flow through your two batteries in one direction. Electrons flow from the negative terminal to positive terminal. If you have + and + together, then they will "repel" each other and electric current cannot flow.
2006-08-01 06:39:02 · answer #1 · answered by Anonymous · 4⤊ 1⤋
Devices have different criteria for which end of the battery that goes in first. When putting batteries in series ....it usually works the same way as in a flashlight. the positive end of a battery is
touching the bulb. All the other batteries are installed in the same direction. All the + ends are going in the same direction.
2006-08-01 13:37:48 · answer #2 · answered by Sam 7 · 0⤊ 0⤋
so that you have a long, continuous battery. Devices running on batteries are usually wired "serial" to provide the voltage you see on one battery. Because it is serial, vs. parallel, the volts do not double, yet it does have a reserve of power lasting 2 time longer than just one battery.
2006-08-01 13:40:38 · answer #3 · answered by Anonymous · 0⤊ 0⤋
It is so they can be in series, meaning one battery's positive touches the others negative.
By connecting batteries in series you increase the voltage while keeping the capacity (amp hours) constant.
If connected in parallel, you increase the amp hours while keeping the voltage constant, basically the device being powered will last longer.
2006-08-01 14:01:30 · answer #4 · answered by ObliqueShock_Aerospace_Eng 2 · 0⤊ 0⤋
The above answers are all geting to the right point, but you need to consider if the bateries are in SERIES or PARALLEL!
If you connect the + to the - end it is in SERIES, so you add the volts.
If you connect + to + or - to -, then you have the batteries in PARALLEL, so you have the same volts but you add the watts.
2006-08-01 14:33:24 · answer #5 · answered by minefinder 7 · 0⤊ 0⤋
here's an easy way to think of it: take 2 magnets and put them together. not refrigerator magnets; just plain magnets. if you flip one of them over, they seem to form a force field and will not work together. but if you flip the other one, they will stick. This is basically what happens with the + and - sides of a battery; + and + won't work, neither will - and -. it has to be + and -.
2006-08-01 13:42:20 · answer #6 · answered by Anonymous · 0⤊ 0⤋
it completes the circuit so electrons flow and you can draw power to do what you want
2006-08-01 14:57:51 · answer #7 · answered by shiara_blade 6 · 0⤊ 0⤋
to complete the circuit like
(one end)..........- +
(other end)........+ -
that is to make the loop.
2006-08-01 13:40:45 · answer #8 · answered by Anonymous · 0⤊ 0⤋