Simple Electric Circuit - Electricity Lesson & Test - My Schoolhouse - Online Learning
When charged particles build up in an object it is
called static electricity. Another kind of electricity occurs when
electrons flow in a current. A battery and wires can make current
Look at the simple electric circuit below. It
consists of four parts 1.) a battery, 2.) a switch, 3.) a light bulb,
The battery pushes electrons from the negative terminal
(where there are many electrons), through the switch, the light bulb, and
the wire into the positive terminal (where there are not many electrons).
As electrons pass through the wire and into the light bulb, a special kind
of wire inside the bulb, called a filament, lights the bulb. Have
you ever heard a light bulb pop when it burns out? The filament has
broken and the flow of electrons has been interrupted.
What if you want to turn the light bulb off? You
need to stop the flow of electrons. Look at the simple circuit.
Notice the switch is off. The circuit has been broken. The
light bulb is not lit. The flow of electrons has stopped because
there is a gap in the circuit, and the electrons no longer have a closed
path. If you want to turn the light bulb back on, the switch must be
closed to complete the circuit.
The wire used in electric circuits is usually made of
copper. Copper and silver are good conductors. Conductors
carry electrons very easily.
Rubber, plastic, and glass are good insulators.
Insulators do not permit electrons to flow through them. Insulators
are poor conductors of electricity and are therefore used to cover wires
used in circuits.
Directions: Answer the questions about
electricity. Use the illustrations to help you.
1. The negative terminal of the battery has
2. The battery pushes electrons from the negative terminal
through the switch, the light bulb, and the wire into the
terminal (where there are not many electrons).
3. A special kind of wire inside a light bulb is called