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Hi,

I am asked to do a presentation on solving problems about basic electrical and to calculate the resistance in simple electrical circuit.

Can anyone help?

Thank you VERY Much :)

2007-08-14 05:56:27 · 5 answers · asked by Ah Lian 1 in Science & Mathematics Engineering

5 answers

My idea of a simple electrical circuit would be a battery (having a voltmeter across it) with a single resistor and an ammeter (in series to read the current).

If that is what you want you just need to show Ohm's Law. The Resistance of a resistor equals the Voltage on it divided by the Current flowing though it. That is R=E/I

Pick a common voltage like 12 volts (as a car battery would have). Pick a resistor whose resistance is a simple number like 1200 Ohms. The ammeter needs to be able to show 0-200 mA. The voltmeter needs to go to at least 12 volts.

Do the calculations on paper and you will see that 12 volts and 100 mA will show a 1200 Ohm resistor.

2007-08-14 06:16:30 · answer #1 · answered by Rich Z 7 · 0 0

To do most basic electricity all you would need to know is Ohm's law which is V= I * R (Voltage = Current * Resistance).

Resistance in a simple circuit is calculated depending on how the circuit is set up. If you have resistors in series then you simply add up the resistances to get to total resistance. If you have resistors in parallel then you add up the inverses of of the resistances and take the inverse of the answer to find the total resistance.

Ex. A 2 Ohm and a 4 Ohm resistor in parallel would be a total resistance of: (1/2) + (1/4) = 3/4 ..... 4/3 ohms.

2007-08-14 06:02:11 · answer #2 · answered by Matt C 3 · 0 0

buy out dated college textbooks and their solutions manual. OR the teachers edition if you can find them. Read it, & do the problems, then if you get stumped ask here. The books tend to be boring. So get a fun one like the 101 spy gadgets for the evil genius or any of their series. BTW all the books being listed are textbooks for engineering. physics for scientists and engineers is used for physics 1 and 2 and will get you through the basics of electrical principles and applications of electrical engineering is a textbook for an intro electrical class most engineers have to take. I would get this book vs the physics. You do need to know a little calculus, but it's not that hard to learn. Youtube can teach you the basics.

2016-05-17 11:12:27 · answer #3 · answered by kasey 3 · 0 0

if you really want to impress them - derive ohm's law (V=IR) from newton's law of motion F=ma

then give an example of a simple circuit resistance from the previous poster

2007-08-14 06:15:44 · answer #4 · answered by lancej0hns0n 4 · 0 0

Another variation of Ohms law is
R=V/C. Resistance is voltage divided by the
current.

2007-08-14 06:10:15 · answer #5 · answered by Anonymous · 0 0

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