Chapter 20.3. Key Concepts: What is included in a circuit diagram? How do series and parallel...
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Electric Circuits Chapter 20.3
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Transcript of Chapter 20.3. Key Concepts: What is included in a circuit diagram? How do series and parallel...
- Slide 1
- Chapter 20.3
- Slide 2
- 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
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- 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
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- Slide 12
- Slide 13
- ParallelSeries
- Slide 14
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- 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?