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Parts of an Atom

Parts of an Atom. ....Downloadsbuild-an-atom_en.jar. Electrical Forces. What is a Force?. A push or a pull. Electric Force. An electric force exists between any two charged particles . A Force is attractive or repulsive. .

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Parts of an Atom

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  1. Parts of an Atom • ..\..\Downloads\build-an-atom_en.jar

  2. Electrical Forces

  3. What is a Force? • A push or a pull

  4. Electric Force • An electric force exists between any two charged particles.

  5. A Force is attractive or repulsive. • A force that pulls unlike charges together is called an attractive force unlike attract + - • A force that pushes like charges apart is called a repulsive force Like charges repel + + or - -

  6. Electric Field Hockey • ..\..\Downloads\electric-hockey_en.jar

  7. Electrical Energy • Is the movement of electrons • Static Electricity- the buildup of electric charge on an object (stored surplus of electrons) • Current Electricity- the steady flow of electric charge due to moving electrons (electrons in motion)

  8. Magnetism The source of magnetism can be thought of as moving and spinning electric charges.

  9. Facts About Magnets • Like poles repel, unlike poles attract. • Magnetic forces attract only magnetic materials. • Magnetic forces act at a distance. • A coil of wire with an electric current flowing through it becomes a magnet. • A changing magnetic field induces an electric current in a conductor.

  10. Conductors Electric current can flow easily through some materials. The atoms of the material have loosely-bound electrons. Metals

  11. Insulators • Electric current cannot flow easily through some materials. • The atoms of the material have tightly bound electrons. • Wood, glass, plastic

  12. Circuits • A circuit is a continuous path that allows electrons to flow • Two types of circuits • Series • Parallel

  13. Series Circuits • Series circuits have only one path for electrons to flow. • When one light goes out, the rest go out. • As more lights are added, the resistance increases and the light bulbs get dimmer. • The voltage is dividing up among the resistors (light bulbs) in this circuit.

  14. Parallel Circuits • Parallel circuits have more than one path for electrons to flow. • When one light goes out, the rest stay on. • As more lights are added, the lights still stay bright. • The lights stay the same brightness because the voltage drop across each light bulb is the same as the battery's voltage. • Parallel circuits have less resistance than series circuits.

  15. The basic difference between series and parallel circuits is • the number of paths for electricity to travel. • This changes the brightness of the lights, the effect of unscrewing one light, the total resistance and the voltage drop across each light.

  16. Resistance • Good conductors of electricity allow electrons to flow easily. When electrons bump into atoms in the wire, they are slowed down. This is resistance. • Resistance opposes the flow of electrons. • The series circuit with more light bulbs had more resistance because the current had do go through all of the light bulbs. • The series circuit has more resistance than the parallel circuit. • The total resistance of the entire circuit is less with more light bulbs because it gets easier and easier to get through

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