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36 Cards in this Set
- Front
- Back
- 3rd side (hint)
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How many valance electrons in a semiconductor? |
4-5 valence electrons. |
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What is current? |
The floe of electricity measured in amps. |
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What is a coulomb? |
The number of electrons that flow in a second. 6.25x10^18 |
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What is matter? |
A substance that has mass and occupies space. |
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What is voltage? |
The push/pull force that moves electrons. |
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What is an Ohm? |
The opposition to current flow. |
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What is a positive ion? |
When an atom has less electrons than protons. |
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What is negative ion |
When an atom has more electrons than than protons. |
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What are the parts os an atom? |
Proton Neutron Electron |
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How many Valance electrons in an insulator? |
It has 6-8 Valance electrons. |
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What does Ohm's law say? |
It says that the current between two points is directly proportional to the voltage across the two points. |
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What is the formula for ohms law? |
I= V/R |
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What is a watt? |
It is the measurment of power in an electrical circuit? |
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1 horsepower in watts? |
746 watts |
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What is conventional current flow theory? |
It says that current flows from + to - |
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What is the electron flow theory? |
Says that current flows from - to + |
Think of the charge of an electron. |
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What is required for current to flow? |
Voltage. |
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What is the power formula? |
P=EI |
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What is electricity? |
The flow of electrons. |
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What is voltage drop? |
Is the voltage used at the resistance used to push current. |
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What is Rt in a series circuit? |
Rt= R1+R2+R3... |
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What is total current in series circuit? |
It= I1 = I2 = I3... |
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What is total voltage in series circuit? |
Et= E1+E2+E3... |
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What is total power in series circuit? |
Pt=P1+P2+P3... |
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How may paths does a series circuit have for current to flow? |
One |
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What is potential difference? |
Is the voltage between two pounts |
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What is created with resistannce? |
Light and heat |
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What is required for a basic cct? |
Closed path, voltage, current |
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What is an element? |
Material made from one type of atom |
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What is a molecule |
Two or more atoms bonded |
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What is a compound? |
Two or more different elements bonded |
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What is current adds? |
The total current flow in a parallel circuit is equal to the sum of the current through all branches. It=I1+I2+I3... |
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Voltage drop in a parallel circuit? |
Voltage drop in a parallel circuit is the same as the applied voltage Et=E1=E2=E3... |
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Calculate total resistance in a parellel circuit if all the resistors are the same. |
Rt=R/number or resistors |
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Product over sum formula? |
Rt=(R1xR2)÷(R1+R2) |
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Reciprocal formula? |
1/Rt= 1÷(1÷R1+1÷R2+1÷R3...) |
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