Electricity (McLean) Flashcards
what subatomic particle can move freely
electrons
What happens to two opposite charges
They attract
What happens to two of the same charges
They repel
How does lightning happen
Charge is created from electrons rubbing against clouds, causing friction, rapid discharge of the electrons can then happen at high temperatures
Series circuit
a circuit with one pathway in which components are connected end to end
Parallel circuit
a circuit that has multiple branches with components that are on, and has junctions that connect the different branches
How is current measured?
Amps (A) with an ammeter
What is current?
the flow of negatively charged electrons through wires
How is voltage measured?
Volts (V) with a voltmeter
Is current higher in a series or parallel circuit?
Parallel circuit
Relationship with pathways and the flow of the electrons
The more pathways, the faster the flow of electrons
What do switches in a series circuit do?
Turn everything off
What do switches in a parallel circuit do?
Can turn off individual branches
How is resistance measured?
Ohms (Ω) with a multimeter
Equation for resistance
Ohms (Ω)= Volts (V) ÷ Amps (A)
Relationship with the area of a conductor and resistance
Twice the area - half the resistance
Relationship with the length of a conductor and resistance
Twice the length - twice the resistance
Symbol for a resistor
A rectangle in-between two lines
symbol for battery
Two cells with an ellipsis between, all between two lines
Symbol for a cell
one line with a longer one on the right hand side and a gap in between, all between two lines
Symbol for a buzzer
Two lines with a gap, where at the end of the both lines there are vertical lines leading up to an upside down semi-circle
Symbol for lightbulb/lamp
Two lines with a circle and an X in the middle
Symbol for ammeter
Two lines with a circle and an A in the middle
Symbol for motor
Two lines with a circle and an M in the middle
