Electronics Flashcards
(39 cards)
Current
The flow of electrons
Circuit
Pathway through which electric current flows
Voltage
The pressure/push of electricity
Parallel circuits
2 or more pathways, lights brighter, each component has its own pathway to battery
Series circuits
Shared pathway, light is dim because if shared voltage throughout components
Short circuit
Pathway cutting off components
Bypasses your intended pathway b/c there is no resistance in the way; shortcut
Resistor
Component that slows down flow of electrons
How do different size resistors affect brightness of bulb
Literal size doesn’t matter
‘Big’ ‘small’ refers to amount of resistance, more meaning less resistance, brighter lights
Resistance
Opposition to the flow of electrons in a circuit
Decode a resistor
Be brave Roy G Biv growl willfully
Blk/br/r/o/y/g/b/I/v/gry/w
Voltage drop
Is the voltage used at a component
Anode
Negative terminal
Cathode
Positive terminal
What chemical reaction creates different charges required to create flow of electrons?
Chemical reaction between electrolyte(acid) zinc anode and copper cathode
Alternating current
Comes from generators such as electrical outlets
DC current
Produced in batteries
Electric motor
Attracting and repelling forces create rotational movement
First truth of circuits
The voltage of the battery is equal to the sum of the voltage at the components
2nd truth of circuits
Greater the resistance at a component, greater the voltage drop of the components in the circuit
Relationship between voltage of power source and voltage drops at components in the circuit
The sum of the voltage drop will equal the total voltage from the power source
Relationship between resistance of the component and voltage drop of the components in a circuit
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What happens when batteries are in parallel
Only one of the batteries provides voltage for components
What happens when batteries are in series?
The voltage of the components will be the sum of the batteries combined
3rd truth of circuits
Hard