Lesson 1
What is an electric circuit
How is ohms law important
it states that resistance in a circuit is equal to voltage divided by current
Resistance=Voltage/current
What is an electronic signal
information that is sent as a pattern in a controlled flow of current through as circuit
what are some disadvantages and advantages of analog signals?
Disadvantage: Analog media takes up a lot of space on media, lower quality of media, and when analog travels to farther places, they weaken and degrade
Advantages: They provide the highest resolution of an action by recording it continuously, and no errors occur
What is voltage and what is it measured in
Its the difference in electric potential energy per circuit and it is measured in volts
What is a series circuit?
all parts of the circuit are connected in one path
What is a wave pulse
what are some disadvantages and advantages of digital signals?
Disadvantages: You dont have a record of any signals that occurred in between each sampling, they use a lot of power
Advantages: The signal is recorded into a set of numbers and it got be stored on a computer
why does positive magnets attract to negative magnets but positive repels positive
Because they have different amounts of electric potential energy
What is a parallel circuit
It is when different parts of the circuit are separated on different branches
What are 4 examples of electromagnetic signals
visible light, infrared waves, microwaves, and radio waves
What is binary signals?
Numbers that computers translate into letters to give us information
what is resistance?
a measure of how difficult it is for current to flow through an object
What is the difference between a parallel circuit and a series circuit
A parallel circuit is when the circuit is separated on different branches, and a series circuit is when there is one big circuit and is connected to each other
What is the difference of uhf and elf
elf is used usually underwater and ulf is used usually above water
What is a pixel
A small uniform shape that are combined to make a larger image on devices such as tv, computers.
What does resistance of an object depend on
Diameter , length, temperature, and material
What are 3 examples of using signals
Doorbell signals, basic hand signals, and reading a book
What is the difference between analog and digital signals
Does it matter if pixels are big
Yes, if pixels are small then the picture will turn out blurry or too pixelated