Electricity

Question 1

What are some characteristics of a circuit diagram?

Answer 1

• The circuit is always rectangular, with straight lines and right angles at junctions
• The power source is at the top of the circuit, being a battery or power supply
• The individual circuit parts are drawn in simplified ways to allow quick understanding of the circuit e.g a bulb is a circle with an x in it, or an ammeter is a circle with an a in it

Check your books or online for all of the symbols, theyre important. Most important ones are DC Power Supply (im 90% sure thats what we use), resistor, variable resistor, bulb, ammeter and voltmeter

Question 2

Define “In series”

In the context of a circuit

Answer 2

In series means that it is part of the same loop, with Ammeters always being connected in series

look it up to see visual representation, this website is cringe again

Question 3

Define “in parallel”

In the context of a circuit

Answer 3

In parallel means it is on its own loop that splits away from the rest of the circuit at a junction. Voltmeters are always connected in parallel

look it up for visual representation blablabla

Question 4

What is Current (I)?

What is its unit and like what is it exactly

Answer 4

• Measured in Amps
• Measured using an ammeter (suprisingly)
• The Current is the amount of electric charge moving per second

also its represented by the letter I idk why

for some reason theres a weird equation to calculate it in my book but I dont think we need it because it has some confusing things like joules and stuff

Question 5

What is Voltage (V)?

What is its unit and blablabla you get it

Answer 5

• Measured in Volts (no way)
• Measured using a voltmeter (who wouldve guessed)
• Also known as potential difference
• The pressure that pushes electrons through a circuit

Question 6

What is Resistance (R)?

What is its unit and how is it calculated

Answer 6

• Measured in Ohms, which is written as Ω
• Resistance is a measure of the opposition a mnaterial exerts against the flow of electrons
• Measured using the current and voltage passing through it

This formula can be changed to make V or I the subject, but yall prob know how to do that also its called ohms law
‎ ‎ ‎ ‎‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ V (V)
R (Ω) = ——–
‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ I (A)

It looks a little wonky sorry about that