I was studying and these two ideas have shocked the theory i've been learning...
1) When a capacitor is connected to a battery/cell... the +'ve part of the capacitor... has to be connected to the positive part of the cell... right? BUT when two or more capacitors are connected in SERIES... it has to be the oter way round... the postive connected to the negative... can someone explain me this please?
2) The Earth magnetic field is like a bar magnet BUT the other way round... the south pole of the magnet would be in the NORTH part of the Earth... therefore the magnetic field of the Earth is from its South to it's north (that is... THE OTHER WAY ROUND) explanation or correction please?
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- Thread Starter
- 12-06-2005 10:00
- 12-06-2005 10:51
1. The positive part of the capacitor still has to be connected to the positive part of the cell, but BETWEEN capacitors you must connect them from positive to negative. Think about when you charge two in series, you want the first to have electrons going away from the positive plate, going through the power supply and onto the negative plate of the second one. This then repels electrons away from the positive plate of the second cathode, and they are also attracted to the negative plate of the first cathode. Draw a diagram and try to figure this out if the explanation doesn't help.. where do electrons go when you charge two capacitors in series?
2. that's correct, the field lines on the Earth go from the geographic south pole to the geographic north, which is the magnetic north (southern hempsphere) to the magnetic south (northern hemisphere)