Now, young grasshopper, in order to become a master of the unit ELECTRICITY, there are a few things that you must know. In fact, these might be the top 10 things that you should know in case you may encounter obstacles or rather tests in your life. However, you must only use this knowledge for good.
1. the difference between conventional current and electron flow; conventional current moves from +ve to -ve and electron flow moves from -ve to +ve
2. equation for current: I = Q/t ; where I is current measured in amperes (A), Q is the charge in Coulombs (C), and t is the time in seconds
3. one electron is the equivalent to 1.6 x 10-19 C and one Coulomb is the equivalent to 6.25 x 1018 electrons
4. the difference between series circuits and parallel circuits (and possibly how it affects the world) *keep in mind that a circuit with both series and parallel circuits are called complex circuits
5. equation for potential difference: V = E/Q; where V is voltage/potential difference measured in volts (V), E is the energy or work in joules (J), and Q is the charge in Coulombs (C)
6. Ohm's Law and Kirchhoff's Law and their relationship --> with this you must be able to solve the CURRENT, VOLTAGE/POTENTIAL DIFFERENCE, and RESISTANCE in a circuit
7. how to add voltmeters and ammeters in a circuit; voltmeters are used in parallel circuits and ammeters are used in series circuits
8. equation for power: P = IV or P = V2/R or P = I2R; where P is power in watts (W) and R is resistance in ohms (Ω)
9. how to figure out the overall resistance when given a colour band resistor (recall: the gold or silver band should always be at the end to indicate the percent error and the last colour before the gold or silver band is the exponent of the power with a base of 10)
10. how to draw/make or read graphs and being able to calculate the slope! SLOPE = RISE/RUN (don't forget to have a detailed title and include labels for the axes with the units)
and that, my young grasshopper, is what you need to know for ELECTRICITY
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