Electrical Circuits.

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Presentation transcript:

Electrical Circuits

A closed pathway that allows transfer of electrical energy. 1. What is a circuit? A closed pathway that allows transfer of electrical energy.

2. Basic Parts of Circuit

Basic parts of a circuit: Load (Receiver) (light bulb) Wires Power Source (battery) Switch

LOAD (Receiver): The part of the circuit that changes electrical energy into another form of energy. Example: electrical energy is transformed by the load of the light bulb to light and thermal energy when the light is turned on.

3. Series Circuit

Series Circuit: a circuit in which all parts are connected in a single loop. If one part breaks the circuit will not work.

If bulb A burned out, no current could flow through the circuit. 8

If bulb B burned out, no current could flow through the circuit A 9

Question: What would happen if bulb C burned out? 10

Refrigerator Example: If your refrigerator was wired by a series circuit and one light bulb burned out, the whole refrigerator would stop working.

4. Parallel Circuits

Parallel Circuit a circuit in which all parts are side by side on different branches.

If bulb A burned out there would still be current the could flow through the circuit.

If bulb B burned out there would still be current the could flow through the circuit. A B C

Question: What would happen if bulb C burned out?

Quick Review:

Sample Question 1: Which circuit is a parallel circuit? B A

Sample Question 2:This is a parallel and series circuit mixed together Sample Question 2:This is a parallel and series circuit mixed together. What would happen if Bulb C burned out? Would the circuit still work? C A B D

Sample Question 3:This is a parallel and series circuit mixed together Sample Question 3:This is a parallel and series circuit mixed together. What would happen if Bulb B burned out? Would the circuit still work? A C B