1. Electricity

2. Electricity Electricity is due to the flow of electrons
Electricity flows through a path called a circuit

3. Types of Circuits: Series Circuits Parallel Circuits
Electricity
Types of Circuits:
Series Circuits
Parallel Circuits

4. Series Circuits – have only one path for electricity to flow

5. Electricity
If any part of a series circuit is broken, the circuit fails. If either light is unscrewed both lights will turn off.

6. Electricity

7. Parallel Circuit – have multiple paths for the electricity to flow

8. Electricity
The branches (paths) of a parallel circuit are independent. If either light is unscrewed, the other will remain on.

9. Electricity

10. Circuit diagrams and electrical symbols
Electricity
Circuit diagrams and electrical symbols

11. Electricity

12. Electricity

13. Three Quantities of a Circuit Voltage Current Resistance
Electricity
Three Quantities of a Circuit
Voltage
Current
Resistance

14. Electricity Current (I) -is the flow of charge -is measure in Amps (a)
-current is moving electrons
-increasing current causes more
electricity to move through a
device

15. Electricity Current is what carries energy Electric current flows from
high electrical potential
energy to low.

16. Current -one Amp is a flow of 1 coulomb of charge per second
Electricity
Current
-one Amp is a flow of 1 coulomb of charge per second

17. Electricity
Electric current flows in a circuit from the positive end of a battery and returns toward the negative end.

18. Electricity Current must pass through the meter when
it is being measured.

19. Electricity Voltage -is measured in Volts (V)
-is electric potential, how much
work a battery can do
-to increase voltage, use a stronger
battery or add batteries

20. Electricity
Current is what actually flows and does work. A difference in voltage provides the energy that causes current to flow.

21. Electricity
A voltage difference of 1 volt means 1 amp of current does 1 joule of work in 1 second.

22. Electricity
The voltage in your home electrical system is 120 volts, which means each amp of current carries 120 watts of power.

23. Electricity

24. Electricity
Resistance - is the measure of how strongly a wire or other object resists current flowing through it.

25. Electricity Resistance -slows down current
-adding devices in a circuit
increases resistance
-Resistance is measured in
Ohms

26. Electricity Resistance and Current -if resistance is high, not much
current flows
-if resistance is low, a lot of

27. Resistance and Current
Electricity
Resistance and Current

28. Electricity Resistance and Current Every device that uses electrical
energy adds resistance to a
circuit.

29. Resistance and Current
Electricity
Resistance and Current

30. Electricity Resistance
-One volt causes a current of 1 amp to flow through a
resistance of 1 Ohm

31. Electricity A multimeter can be used to measure resistance of a
device that has
been completely removed from the circuit.

32. Electricity