Key Concepts: What is included in a circuit diagram? How do
series and parallel circuits differ? How do you calculate electric
power and electrical energy used? Vocabulary: Electric circuit
Series circuit Parallel circuit Electric power
Slide 3
Use symbols to represent parts of a circuit. Include: Sources
of electrical energy Devices that are run by electrical energy
Slide 4
Each battery = 1.5V
Slide 5
Slide 6
Charge has only ONE path through which it can flow. If one
element stops functioning in a series circuit, NONE of the elements
can operate. The bulbs in a circuit are a source of resistance. The
more bulbs, the more resistance.
Slide 7
Voltage is split equally among the resistors in the circuit.
Current is the same throughout the circuit. - 6V3V0V +
Slide 8
What would the voltage be at each bulb if the total voltage is
9 V. How could you make each bulb brighter
Slide 9
Charge has TWO OR MORE paths through which the charge can flow.
If one element stops functioning, the rest of the elements can
still operate.
Slide 10
Slide 11
Slide 12
Slide 13
ParallelSeries
Slide 14
Slide 15
Slide 16
Power is the rate of doing work. Power is measured in WATTS
(W).
Slide 17
Electrical power is the rate at which electrical energy is
converted to another form of energy. Electrical power is calculated
by multiplying voltage by current. P (watts) = I (amps) x V
(volts)
Slide 18
Electrical power is calculated by multiplying voltage by
current. Power (P) = Current (I) x Voltage (V) (W)atts (A)mps
(V)olts
Slide 19
An electrical oven is connected to a 240- volt line, and it
uses 34 amps of current. What is the power used by the oven? P = I
x V P = 34A x 240 V P = 8200 W
Slide 20
Math Practice Page 611 Problems 1 3 Page 613 Problem 7 - 8
Slide 21
How much energy is used by an appliance. Energy = Power x Time
E = P x t Unit = kilowatt-hours
Slide 22
The power rating on an electric oven is 9300 watts. If the oven
is plugged into a 240-volt line, how much current does it use? What
is the resistance of the oven? If the oven is operated for 1 hour
per day, how much electrical energy does it use per day.
Slide 23
A freezer has a power rating of 105 watts. How much current
does it use if it is plugged into a 120-volt line? If the freezer
is used all the time, how much electrical energy does it use in a
year?
