lareina-mccarty
Uploaded by
17 SLIDES
327 VUES
170LIKES

Understanding Electric Circuits: Types, Components, and Safety

DESCRIPTION

This video provides a comprehensive overview of electric circuits, explaining the definition of a circuit as a closed conducting pathway. It covers schematic diagrams, circuit symbols, and key terms such as closed and open circuits, short circuits, and grounding. Learn about the importance of fuses and circuit breakers for safety, as well as the differences between series and parallel circuits. Detailed examples illustrate how to calculate equivalent resistance in both types of circuits. Ideal for beginners looking to grasp the fundamentals of electricity and electronic components.

1 / 17

Télécharger la présentation

Understanding Electric Circuits: Types, Components, and Safety

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Basic CircuitsElectricity Video 2

  2. Circuits • What is a circuit? • A circuit is a closed conducting pathway. • When we draw a circuit, we actually draw a schematic diagram. • Using a schematic diagram allows you to construct circuits too.

  3. The Symbols Resistor Capacitor Switch Battery Potentiometer Ground Light bulb

  4. The Terms • A closed circuit is a circuit through which electric charges can flow. • An open circuit is a circuit through which no electric charges can flow. • A load is any element or group of elements that can dissipate energy.

  5. Short Circuit • What happens when you have a short circuit? • Imagine putting a wire with no load across both ends of a battery. • This can cause a fire!

  6. Grounding • What would happen if you’re hit by lightning? • What happens to buildings when they are hit by lightning? • Most buildings have lightning rods that offer a straight path for the lightning to the ground. • Grounding allows the electrons to go straight to the earth and not harm the things in between.

  7. Fuses • Have you ever blown a fuse? • A fuse is a small piece of wire that melts if the current gets too high. When it melts, it breaks the circuit. • A circuit breaker does the same thing as a fuse. It contains a piece of metal that bends when it is too hot. This bending opens the circuit. • Why are fuses and circuit breakers good things?

  8. Emf (Voltage) • What would happen if you connected two wires to a light bulb? • Without a battery, there is no flow of charges. • A battery or any device that increases the flow of potential energy and electrical energy in a circuit is known as a source of emf.

  9. Types of Circuits • There are 2 types of circuits • Series circuits • Parallel circuits

  10. Series Circuits • In a series circuit, there is only one path for the electric charges to flow. • What happens if the first bulb burns out?

  11. Parallel Circuits • In a parallel circuit, there is more than one way for the circuit. A parallel circuit has branches. • What happens when 1 bulb burns out?

  12. Resistors in Series • When moving in a series, charges that go through one device must travel through another. This affects the current in the circuit. • The more resistors in a series circuit, the lower the current. However, the current is equally distributed over each resistor.

  13. Resistors in Series • The total resistance of the circuit can be calculated by adding all the resistance in the circuit. • This number is called the equivalent resistance. • What about voltage?

  14. Problem 3 • A 9.0 V battery is connected to four light bulbs in series. Resistance is as follows: 2 Ω, 4 Ω, 5 Ω, and 7 Ω. Find the equivalent resistance and the total current in the circuit.

  15. Resistors in Parallel • In a parallel circuit, the current has many paths that it can take. • In a parallel circuit, the potential difference is the same at each resistor. • This means that you will sum the current to get the total current of the circuit.

  16. Resistors in Parallel • The equivalent resistance is the reciprocal of the sum of the individual resistances.

  17. Problem 4 • A 9.0 V battery is connected to four light bulbs in parallel. Resistance is as follows: 2 Ω, 4 Ω, 5 Ω, and 7 Ω. Find the equivalent resistance and the total current in the circuit.

More Related