Analog or Digital
The clock on our classroom wall is an example of...
analog device
In order for electricity to flow you need your switch to be
closed
When calculating power of an electrical circuit you....
multiply voltage times current
an electrical component that restricts the flow of electricity
resistor
You circuit uses what kind of energy?
electrical
Using an I-pod to listen to music is an example of...
digital device
explain the difference between batteries in parallel and batteries in series
parallel- batteries are next to each other. Does not increase the power of the circuit
series- batteries are one after the other (train). Increases in the voltage and current (power)
Ohm's Law states that you find the resistance of a circuit by
taking the current divided by the voltage
the net movement of electrons through a conductor, or the amount of electrical charge passing through a circuit
current
When energy is stored in your battery that is called
potential energy or chemical energy
Digital devices use a code, usually __________ ________ which uses 1s and 0s in series
binary code
What does a voltmeter measure? What does the ammeter measure?
voltmeter-voltage
ammeter- current
Find the power of a circuit with a voltage of 3 and a current of 5.
15 watts
the amount of work or pressure associated with moving the electrical charge through a circuit
voltage
Describe the energy transfer that happens when you close your switch and the battery lights up the a light bulb
chemical to electrical to light
Explain how an analog signal works. Use any analog device you would like to explain
actual light waves or sound waves are recorded onto a physical device.
draw a schematic for two batteries in series with a switch, an ammeter, and a fan
see drawing
Find the resistance of a circuit with a current of 30 A and a voltage of 120 V
30 / 120 = 1/4 or .25 ohms
optical fiber
a thing flexible glass or acrylic strand that can transmit light.
describe the energy transfers that occured when a court with a fan is turned on by closing the switch
chemical to electrical to mechanical
Explain how an digital signal works. Use any digital device you would like to explain
The physical wave is encoded with binary code, sent to the device and then the code is interpreted and the sound or image is recreated.
describe two reasons why a circuit might not work
-circuit is not properly connected
-switch is not closed
-batteries do not have sufficient power for the electrical device
-resistor is too high
If you put a 15 ohm resistor into a circuit with a voltage of 3, what is the current in the circuit?
15= ?/ 3
15 x 3= 45 A
define analog and digital signals, highlight how they are different from eachother
analog-signal or information which is represented through a continuously
Which circuit has more energy?
circuit A- has a 12 volt battery with 30 A of current and a 10 ohm resistor
Circuit B- has a 12 volt battery with 300 mA of current
they are the same, 36 Watts