92 lines
1.4 KiB
Markdown
92 lines
1.4 KiB
Markdown
# What is electricity
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Electricity is the flow of electric charge.
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# Atoms
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Atoms are build up of Protons, Neutrons and Electron.
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Electrons can escape the atom and bind to a new Atom.
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Copper is used in wires because it has 29 Electrons, with one in the outer (Valence) Shell. This Atom can easily escape and switch places.
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## Ohms Law
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V = I * R;
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I = V / R;
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## Voltage
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is like the pressure in Cable, it forces the Electrons to move.
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## Current
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A cable with a lot of electrons flowing through it has a high current.
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A cable can only handle a specific type of current.
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When the current is to high, the cable breaks
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## Circuit
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A electric circuit is a closed loop through which electrons flow.
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## How to find resistance of resistors in series?
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Just add them up
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## How to find the resistance of resistors in parallel?
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When each of the resistors provides a new way to reach ground, then
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1/R = 1/R1 + 1/R2 + 1/R3;
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**Example:**
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R1 = 4 Ohm
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R2 = 5 Ohm
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R3 = 20 Ohm
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1/R = 1/4 + 1/5 + 1/20;
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1/R = 0.5 | * R;
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1 = 0.5R | * 2;
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2 = R;
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10 Ohm
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23 Ohm
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17 Ohm
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1/R = 0.20230179 | * R
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1 = 0.20230179R | / 0.20230179
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4.94 = R;
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## Test
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Input: 50v
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Current: 2A
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Resistors: 19Ohm
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Ohms Law = V = I*R;
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50 = 2*(19+R);
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50 = 38+2R | - 38;
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12 = 2R;
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6 = R;
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R = V / I;
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Ohms law only works for D/C and NOT A/C;
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5V in
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1/R = 1/100+1/1000;
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1/R = 0.011;
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1 = 0.011R;
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90.90909 = R;
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I = V / R;
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I = 5 / 90.909090
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I = 0.055;
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I = 5.5mA
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## Watts
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## Volts
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## Amps
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