1
What supplies energy in an electric circuit?
A battery
Which material is a conductor?
a. plastic
b. silver
c. glass
d. wood
B. Silver
Which type of circuit is circuit A in your packet?
a. series
b.parallel
c. perpendicular
d. current
A. Series
Which item in a resistor in circuit b?
a. light bulb
b. wire
c. battery
d. screws
A. Light bulb
Double Jeopardy
Why did the person who made circuit a probably connect the wires to a penny?
They were testing to see if the penny conducts electricity
Which of these could be used as a resistor in a circuit?
a. pencil
b. gas engine
c. rubber eraser
d. electric motor
D. An electric motor
What is the electrical charge?
-+-+-
Negative
What is the electrical charge?
-+-+-+
No charge
What is the electrical charge?
-+-+-+-++++
Positive
What is the electrical charge?
-+-+-+++Positive
What is the electrical charge?
-+-+-+-+-+-+-+-+-+
No charge
What is the electrical charge?
-+-+-+-+--
Negative
In a simple series circuit, why does the bulb light when you close the switch?
Because closing the switch completes the circuit
In a simple series circuit, why does the bulb go out when you open the switch?
Because opening the switch breaks the circuit
Double Jeopardy
Imagine a simple series circuit with one 1.5V battery and one bulb. When the 1.5V battery is replaced with a 3V battery the
bulb gets brighter
Double Jeopardy
Imagine a circuit with a 1.5V battery and one bulb. Imagine a similar circuit with a 3V battery and two bulbs. Which has the brightest bulbs?
The bulbs in both circuits are of similar brightness levels
Why might a bulb flash and go out when a 1.5V battery and 3V battery are both connected across it in a simple series circuit?
Too much electricity flows through the bulb's filament and the bulb breaks
What is the effect of changing the wire in a circuit from a straight thick wire to a straight thin wire?
The bulbs become less bright
What is the effect of changing the wire in a circuit from a straight thick wire to a longer (coiled) thick wire?
The bulbs become dimmer
In a circuit diagram, what does a circle with a cross inside it represent?
What do the long straight lines represent in a circuit diagram?
Wires
How is the battery represented in a circuit diagram?
A long line and a short line
Double Jeopardy
Motors work because electricity in a coil makes one of these ___________________
Magnet
Scientist that used a kite to demonstrate static electricity is __________________________
Benjamin Franklin
Scientist responsible for the invention and a new way or producing light is ____________________
Thomas Edison