Download presentation

1
**Chapter 19: Electric Charges and Currents**

Electric Circuits and Electric Power

2
Electric Circuits An electric circuit provides a complete, closed path for an electric current. An electric circuit consists of a source of energy (voltage source), a load (resistance), wires, and a switch

3
Electric Circuits Source: battery, thermocouple, etc. Load: uses electric energy (light bulb, appliance, etc.) - offers some resistance to current flow Switch: opens and closes the circuit A current needs a closed path - if a switch is off, the circuit is open.

4
**Parts of an Electric Circuit**

Source (Battery) Load (Light Bulb)

5
Electric Circuits Electricity cannot flow through an open circuit. Electricity can only flow through a closed circuit. Closed Circuit Open Circuit

6
**Series and Parallel Circuits**

Series Circuit: circuit in which all parts are connected one after another. If there is a break, the entire circuit is opened and no current flows Parallel Circuit: circuit in which different parts are on separate branches. If there is a break, electrons can still move.

7
**Series and Parallel Circuits**

8
Series Circuit

9
Parallel Circuit

10
**Series and Parallel Circuits**

Fuse: this strip of metal used for safety because when the current flowing through it becomes too high, it melts and breaks the flow of electricity - Protects against too much current flow (overload) - Once fuses burn out they must be replaced

11
**Series and Parallel Circuits**

Circuit Breaker: reusable device that protects a circuit from being overloaded - Easier to use than fuses

12
**Power = Voltage x Current**

Electric Power Electric Power is the ratio at which electric energy is used by doing work, or by changing to a different form, such as heat or light Power = Voltage x Current P = V x I Watts = Volts x Amperes

13
**Kilowatt-hours = Kilowatts x hours**

Electric Energy Energy = Power x Time E = P x t Kilowatt-hours = Kilowatts x hours

Similar presentations

© 2020 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google