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What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?

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Presentation on theme: "What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?"— Presentation transcript:

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2 What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?

3 The current in a DC series circuit:

4 Is the same in all points of the circuit

5 If you compare an electrical circuit to a system that carries water, what would the water pipes represent?

6 WIRES

7 The ability of an object to resist current is called:

8 Electrical resistance

9 Objects that conduct electricity poorly are called =

10 = INSULATORS

11 A circuit with a switch turned to the OFF position or a circuit with any break is called:

12 OPEN CIRCUIT

13 WHOLE BRAIN TIME -Please turn to your partner and discuss - - The current in DC circuits - - Insulators - - electrical resistance - - wires are like what?

14 WHAT Type of Circuits ARE THEY?

15 The mathematical relationship between current, voltage, and resistance is known as:

16 OHM’s LAW

17 What is the current in each resistor in the circuit?

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19 WHOLE BRAIN TIME -- Turn to your partner and discuss --When do you use that weird formula --Will that weird formula be on the test --How do you find current in a parallel circuit

20 A circuit diagram: =

21 A circuit diagram: = makes wiring easier =

22 A circuit diagram: = makes wiring easier = uses symbols to represent each part of the circuit =

23 A circuit diagram: = makes wiring easier = uses symbols to represent each part of the circuit = can be interpreted (understood) by anyone familiar with electricity

24 A circuit diagram: = makes wiring easier = uses symbols to represent each part of the circuit = can be interpreted (understood) by anyone familiar with electricity

25 A closed Circuit is =

26 = ON

27 In many circuit diagrams, any device that uses electrical energy is represented by a:

28 resistor

29 A device that uses chemical energy to push current in a circuit is called a =

30 A device that uses chemical energy to push current in a circuit is called a = = A BATTERY

31 WHOLE BRAIN TIME -- Turn to your partner and discuss --What does a battery do --When is a resistor shown --How do you know it is a closed circuit -Talk about a circuit diagram

32 Electrical current will pass easily through =

33 = CONDUCTOR

34 As Jing toasts her morning waffle in the family toaster, 3.0 amperes of current flows with a voltage of 150 volts across the toaster. The resistance of the toaster is:

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40 A stereo receiver is plugged into a 120-volt outlet. If the receiver has a resistance of 360 ohms, how much current does it use?

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47 What happens to the current in a circuit with fixed voltage if you increase the resistance of the circuit?

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50 A light bulb requires 3 amps to produce light. The resistance of the bulb is 4 ohms. How many batteries do you need if each battery is 1.5 volts?

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59 Total Voltage = Total Resistance =

60 Total Voltage = 9 V Total Resistance =

61 Total Voltage = 9 V Total Resistance = 4.5 ohms

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68 What is the voltage drop across each resistor?

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73 So in a series circuit (like the one we just did), what can we say about voltage drops?

74 If you add all the voltage drops ( ) = EQUALS the total Voltage…..right?

75 Is current the same though all components of a series circuit?

76 The current in each resistor is?

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80 Is the current the same across each of these resistors? Why or Why not?

81 YES……because…..?

82 Is the current the same across each of these resistors? Why or Why not? YES……DC circuit

83 Is the current the same across each of these resistors? Why or Why not? YES……DC circuit To calculate but Use Total Resistance


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