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
100
he type of energy a circuit always starts off with is ________________ energy.
Electrical
100
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
100
100
battery
200
What is the role of a load in an electric circuit?
The load is the part of the circuit that receives electrical energy and can be turned on.
200
Which part of a circuit changes electrical energy into another form of energy?
The load
200
Which material will best conduct electricity?
A. plastic
B. rubber
C. wood
D. silver
D. silver
200
200
potentiometer
300
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.
300
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
D. a speaker
C. a fan
300
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.
300
300
diode
400
Where are the load, wires, and energy source located in a lamp?
The load is the lightbulb, the wires are located in the electrical cord and inside the lamp, and the energy source is the electrical outlet which leads all the way to a power plant.
400
If an electrical circuit has a bell for a load and a battery for an energy source what energy conversions will occur?
chemical energy --> electrical energy --> sound energy
400
Ms. P wants to make an electric circuit but she is fresh 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 wool
keys
aluminum foil
etc.
400
400
electrolytic capacitor
500
Name a load that can transform electric energy into thermal energy and name another load that can transform electric energy into sound energy.
Thermal- lightbulb, heater, etc.
Sound- radio, speaker, phone, computer etc.
500
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!