Parts of a Circuit
A student is constructing an electrical circuit. Which of the following can provide energy for the circuit? A.electric generator B. Wire C. light bulb D.buzzer
Answer: A. an electric generator
the type of energy a circuit always use is called ________________ energy.
Electrical
What is needed for a circuit to work? if you have all the components.
it needs to be closed.
Some students test a plastic spoon as a connector in an electrical circuit. Electricity does not flow in the circuit. Plastic is most likely... A. a load. B. an energy source C. a conductor D. an insulator
D. an insulator
What is voltage
The push the moves the electrons
What is energy?
the ability to do work or cause change or move something
Name one conductor and one insulator.
Conductor: Copper
Insulator: Plastic
Which material will best conduct electricity? A. plastic B. rubber C. wood D. silver
D. silver
True or False?
Increasing the number of batteries increases the voltage.
True
Which device can be added to an electrical circuit to convert electrical energy into mechanical energy? A. a switch B. a lightbulb C. a fan
C. a fan
A bulb is not lighting in a simple circuit. Give two possible reasons why.
The circuit is open (a loose or broken connection).
The battery is dead or inserted incorrectly.
The bulb is burned out.
If you connect the wires of an electric circuit to a piece of jewelry why would the lightbulb in the circuit still turn on?
Because the jewelry is made of something that can conduct electricity.
Explain how a switch works in an electrical circuit.
When the switch is on the circuit is closed so electricity can flow. When the switch is off the circuit is open so electricty cannot flow.
If an electrical battery is used to turn on a speaker.
what energy conversions will occur?
chemical energy --> electrical energy/sound energy
In a series circuit, what happens to the brightness of bulbs when more bulbs are added? Why
They become dimmer because the voltage is shared among all bulbs.
Ms. P wants to make an electric circuit but she is out of copper wire. What are 3 other household items that she could use in place of wire to carry the electricity to the load?
silverware metal necklaces steel keys aluminum foil etc.
Name 3 examples of an energy source.
Battery
electric generator at a power plant
cell
Name a device/object that can transform electric energy into thermal energy and name another device/object that can transform electric energy into sound energy.
Thermal- lightbulb, heater, etc. Sound- radio, speaker, phone, computer etc.
A circuit has three identical bulbs (A, B, and C) connected in series with a 9V battery.
Suddenly, Bulb B burns out (its filament breaks).
In a series circuit, there is only one path for the current.When Bulb B burns out, the path becomes open (broken). No current can flow through the circuit anymore. Because the current stops, all bulbs go out, even though A and C are still good.
Why do electricians use wire that is coated in plastic when they are making new circuits?
This is because the wire can be dangerous to handle and can shock humans if they handle it when the circuit is on. The plastic coating helps to protect the electricians and us!