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Simple Circuits
41 questions By Tony R. Kuphaldt
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Question 40 of 41
What difference will it make if the battery in this circuit is reversed in direction?
Reveal answerThe choice of battery “polarity” in a simple light bulb circuit makes no difference at all. In either case, the light bulb will energize when the switch is closed.
Notes:It should be noted that not all electrical loads are “non-polarized” like an incandescent light bulb. Some electrical components, such as light-emitting diodes, are polarity sensitive, and will function only if current goes through them in the proper direction.
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Question 41 of 41
From observation of this circuit (with components attached to a “terminal strip”), draw an appropriate schematic diagram:
Reveal answer
Notes:This type of question is one that lends itself well to students drawing their answers on the board in front of class. The skill of transferring a real circuit into a cleanly-drawn schematic is one that some students struggle mightily with, but it is important. Those students will want to know what technique(s) may be used to make the transfer. Students who are more spatially adept will probably have a couple of different ways to approach a problem such as this. Allow them to explain to the rest of the class their technique(s) for tracing the real circuit’s wiring into a schematic diagram.
Giving students the opportunity to teach their peers is a powerful instructional method, and should be encouraged at all times!
