Assessment Flashcards
What is used in a circuit to allow of prevent the flow of current?
switch
In what type of diagram are symbols used to represent components of the actual circuit?
circuit diagram
what are the three unique electrical variables?
- current
- voltage
- resistance
What is current?
the measure of the rate at which the elctorn flows in a circuit
the symbol is I
it is measured using a ammeter
unit for current is Amperes (A)
What is voltage?
amount of energy the electrons are carrying as flow between two points
the symbol for voltage is V
it is measured using a voltmeter
the more voltage the more energy
What is resistance?
the ability to slow down the flow of electrons though it
the unit of electrical resistance is calls Ohms
the device used to measure electrical resistance is called ohmmeter
anything that slows a circuit down such as a light bulb
when bulbs are connected in series, the current in the circuit does what?
decreases
When bulbs are connected in series, the voltage drop across each bulb does what?
decreases
When batteries are added in series, the current in the circuit does what?
increases
when batteries are added in series, the voltage drop across each bulb does what?
increases
when multiple paths are added, the current is…
increased
when multiple paths are added, the voltage is…
decreased
Parallel rules
Current: splits among the branches: i total=i1=i2
Voltage: same as the source: V total=V1=V2…
Series circuit rules
Current: stays the same throughout: i1=i2=i3
Voltage: splits among the loads: V total=V1+V2…
What is Ohms law?
it is a relationship between resistance, current, and potential difference (voltage)
