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Showing results for tags 'circuits'.
Found 6 results
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Name: Brainiac - Electric Fence Category: Electricity & Magnetism Date Added: 2017-12-18 Submitter: FizziksGuy Electric Fence Experiment Richard Hammond shows the Brainiacs how fun Electricity can be. Also, yes, if you are in the air when the electricity goes through, you don't get a shock. You don't get shocked if the circuit (box to fence to person to ground to box) doesn't complete. On top of that, the end where he ALMOST shakes Hammond's hand, he doesn't. Also, the slight gap in time between feet hitting ground and the shock can be attributed to the 1-2 second delay caused by the fence not being constantly on. Brainiac - Electric Fence
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The electrical grid is wired in parallel. Why? The benefit of having your home wired in parallel rather than in series is having a uniform voltage rather than a uniform current. Because your home is wired in parallel, manufacturers of electrical products can set a specific resistance and know the expected current because of ohm's law V=IR, rearranged to I=V/R. The danger of having everything wired in parallel is that increasing the amount of resistors in the circuit decreases the equivalent resistance of the entire circuit. This can lead to a dangerous amount of current travelling though the wires in your house. However, there are safeguards preventing a dangerous amount of current from damaging the products in your home. The circuit breaker exists as the weakest part of the circuit that is your home. This ensures that, in the case of a dangerous amount of current, the circuit breaker flips first, so any products plugged into your outlets are kept safe. Wiring in parallel makes developing electrical consumer products easy and protecting against the dangers of parallel circuits is done by the circuit breaker.
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On March 16, 2014, fezziksphysics referenced my post, and I was interested to know someone else's perspective on their learning style and how they understand material. I definitely agree that the VIP charts became much easier once I understood and applied what I had learned. This part of physics reminded me of math, I just needed to do the problems a couple of times to truly understand them. I also really liked how she wrote down all the formulas, also!
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Physics class is becoming very interesting, especially through this circuits chapter. I am learning about series and parallel, and the different formulas that are applied for each. I have also learned about Ohm's Law (V=IR). At first it was difficult to remember the different formulas for both series and parallel circuits, but after doing many VIR Charts, the work has become a bit simpler. I have learned a few things for both series and parallel circuits Series: Electric Current (I) is equal all the way through = I1=I2=I3 Parallel: R = (R1-1 + R2-1 + R3-1)-1 Also, this Kahn Academy video has explained a little more for me! www.youtube.com/watch?v=3o8_EARoMtg
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For each problem, students are asked to begin by highlighting what information they are given, and what they are asked to find. Goal of the exercise is to have students begin to recognize start and end points of a problem, then search for pathways from the start to the end.Free
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Handout / guide sheet for AP Physics C students studying circuits.Free
