Presentation on theme: "Notes on Chapter 35 Electric Circuits"— Presentation transcript:
1 Notes on Chapter 35 Electric Circuits Conceptual PhysicsNotes on Chapter 35Electric Circuits
2 Electric CircuitsAny path in which electrons flow is a Circuit. There can be no gaps in the flow of electrons.
3 Electric CircuitsA gap in the circuit is known as an Open Circuit. Electrons will not flow.A Closed Circuit is when the flow of electrons is possible.
4 Electric CircuitsMost circuits have more then one devise that receives electrical energy. These connections are in either:SeriesParallel
5 Electric Circuits SERIES CIRCUITS: Fig shows three lamps in series connected to a power supply --- a battery.Electric current has ONLY a single path through the circuit.Resistance is the TOTAL resistance of each lamp or resistor along the pathway.The current is equal to the voltage source divided by the total resistance (Ohm’s Law)As the number of lamps is added, the resistance is INCREASED.The disadvantage of a series circuit is if one lamp fails (burns out) the whole circuit fails.
6 Electric Circuits PARALLEL CIRCUITS: Fig shows three lamps connected in parallel.Each lamp connects the same two points. Therefore, the voltage is the same across each device.The amount of current in each lamp is the same.Total current in the circuit equals the SUM of the currents in each pathway.As the number of lamps is added, the resistance is DECREASED.
7 Electric CircuitsSCHEMATIC DIAGRAMS:See Fig on page 554.
8 Electric CircuitsBatterySINGLE (Cell)DOUBLE HIGH(Battery) VOLTAGE
9 Connecting wire – Black line Electric CircuitsConnecting wire – Black line