Making Electricity Useful Circuit Diagrams Electrical circuits can be shown in diagrams using symbols 90V Circuit Diagram Symbols AC DC battery AC power supply DC power supply bulb resistor ID: 525511
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Slide1
Electrical Circuits
Making Electricity UsefulSlide2
Circuit DiagramsElectrical circuits can be shown in diagrams using symbols:
9.0VSlide3
Circuit Diagram Symbols:
AC
DC
battery
AC power supply
DC power supply
bulb
resistor
switch
conductors (wires)
A
V
voltmeter
ammeterSlide4
Circuit Components:
Ammeter – measures amount of current (I)
Voltmeter – measures the amount of voltage (V)
Add resistance (R) to a circuit (slows electricity)
Batteries – add voltage/current to the circuit
AC Power Supply – adds AC current to the circuit
Switch – allows the electricity to be turned on/off
A
V
ACSlide5
What will the Ammeter Read?(Find the amount of current (I))
A
8.0
24 V
?
Ammeter measures
current
I = V ÷ R
I = 24v ÷ 8.0A
I = 3.0 ASlide6
Creating and Interpreting Circuit Diagrams:
Draw the following circuit
diagram:
A circuit with a
9.0 v battery, an ammeter, and a 3.0
resistor
.What will the ammeter
read? (What amount of current is in the circuit?)Slide7
Circuit Diagram #1
9.0V
A
3.0
I = V/R
I = 9.0V/3.0
I = 3.0 ASlide8
Creating and Interpreting Circuit Diagrams:
Draw
a
circuit with
…AC power supply
an ammeter
a voltmeter8.0 resistor
If the ammeter reads 4.5 Amps, what will the voltmeter read?Slide9
Circuit Diagram #2:What will the voltmeter read?
A
8.0
AC
4.5A
V = I
•R
V = (4.5A)(8.0
)
V = 36v
V