Electrical Circuits

1
Electrical Circuits

• Parts of a simple circuit
• Wire
• Load
• Power Source--- _________________
• Switch

2
Power source AC or DC

• Alternating Current flow of electric charge that
  regularly reverses its direction.
• generated from outlets
• Direct Current charge flows in one direction.
• generated from __________________

3
Open Circuit vs. Closed Circuit

• When switch is open, there is no voltage
  difference and NO CURRENT WILL FLOW.
• A circuit must have a complete path from positive
  to __________________ electrodes for current to
  flow.
• Light switch when it is ON, it has a(n)
  __________ circuit, when it is OFF, it has a(n)
  ________________ circuit.

4
Types of Circuits

• Series Circuit
• The parts are wired one after another
• Example old christmas tree lights
• If one light goes out
• All go out
• One load effects the current in the loads after
  it. (example lights will get dimmer one after
  another)

5
Types of Circuit

• Parallel Circuit
• the electricity has more than one path it can
  travel.
• Examples used in cars, houses, most everything
• If one light bulb (or load) goes out, the rest
  stay on
• All light bulbs stay equally light because each
  has its own pathway

6
Circuit Safety Features

• Electrical energy enters your home at the circuit
  breaker or fuse box and branches out to wall
  sockets, major appliances and lights.
• Electric fuse- A safety device that detects too
  much current in a circuit. A fuse often has a
  component that melts and opens the circuit.
• Found in
• Cars, boats and
• Big appliances

7
Circuit Safety Features

• Circuit Breakers
• A safety device that detects too much current in
  a circuit.
• A circuit breaker often contains a bimetallic
  strip that bends and trips a switch that opens a
  circuit.

Found in Houses