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Electric Circuits

Electric Circuits. Circuits. Electric charges move in a looped path called a circuit – starts and ends in the SAME spot A simple circuit contains a source of energy and at least one conductor. Energy (battery)  Conductor - wire. Circuits. A circuit may also contain a SWITCH

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Electric Circuits

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  1. Electric Circuits

  2. Circuits • Electric charges move in a looped path called a circuit – starts and ends in the SAME spot • A simple circuit contains a source of energy and at least one conductor Energy (battery)  Conductor - wire

  3. Circuits • A circuit may also contain a SWITCH • A switch opens and closes a gap in the circuit • A closed switch allows energy to flow through • An open switch stops the current from flowing

  4. Energy • The source of energy may be a battery • Chemical energy inside a battery transforms into Electrical energy • Energy flows from the negative (-) end of a battery to the positive (+) end • The flow of electrons is electricity • Some electric energy always changes to heat energy

  5. Transforming Energy • Resistors can change electrical energy into other forms of energy (heat, light, sound, motion) • EXAMPLES • Light Bulb turns Electrical Energy into Light Energy • Bells & Buzzers turn Electrical Energy into Sound Energy

  6. Circuit Diagram • A circuit diagram is a MAP of a circuit • Turn to page 484 in Textbook

  7. Complex Circuits • Most electrical circuits are more complex than the one in a flashlight or a bell or buzzer • A parallel circuit has more than one branch or pathway • A computer circuit has millions of paths • It still needs to be CLOSED for the electricity to flow • Starts and ends at same point • Parallel Circuit Diagram 

  8. Electromagnets • Electricity and Magnetism are closely related • Every electrical current produces a magnetic force • An electromagnet is a magnet that carries an electrical current • Like a magnet • Has north and south poles • Unlike a magnet • Can be switched on and off

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