![]() Boosting current capacity through parallel connectionsīegin this experiment by connecting one 6-volt battery to the lamp.This lamp will be used as a "heavy" load for your batteries ( heavy load = one that draws substantial current).Ī regular household (120 volt) lamp socket will work just fine for these low-voltage "RV" lamps. High-wattage 12-volt lamps may be purchased from recreational vehicle (RV) and boating supply stores. Can you predict what the overall voltage polarity will be, knowing the polarities of the individual batteries and their respective strengths? ![]() Analog meters simply will not read properly if reverse-connected, because the needle tries to move the wrong direction (left instead of right). Remember, if the meter's digital indication is a positive number, the red probe is positive (+) and the black probe negative (-) if the indication is a negative number, the polarity is "backward" (red=negative, black=positive). How does the total voltage compare in this situation to the previous one with both batteries "aiding?" Note the polarity of the total voltage as indicated by the voltmeter indication and test probe orientation. What is the total voltage in this case? Try reversing the terminal connections of just one of these batteries, so that they are opposing each other like this: Try connecting batteries of different sizes in series with each other, for instance a 6-volt battery with a 9-volt battery. Measure the voltage across each battery individually as they are connected, then measure the total voltage across them both, like this: If you connect batteries so that the positive of one connects to the negative of the other, you will find that their respective voltages add. How to connect batteries to obtain different voltage levelsĬonnecting components in series means to connect them in-line with each other, so that there is but a single path for electrons to flow through them all.Lessons In Electric Circuits, Volume 1, chapter 11: "Batteries and Power Systems" Lessons In Electric Circuits, Volume 1, chapter 5: "Series and Parallel Circuits" These experiments are designed to introduce you to several important concepts of electricity related to DC circuits.Īctually, any size batteries will suffice for this experiment, but it is recommended to have at least two different voltages available to make it more interesting. "DC" stands for Direct Current, which can refer to either voltage or current in a constant polarity or direction, respectively. Lessons In Electric Circuits - Volume VI Chapter 3 DC CIRCUITS Lessons In Electric Circuits - Volume VI (Experiments) - Chapter 3
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