Electronic Notes

series

same current

paralled

same voltage

series resistance

add the resistors

parallel resistance definition

total is less than smallest branch of resistance

series voltage

drops add up to the supply voltage

total parallel current

equals the sum of the branch currents

what is connected in a series with the circuit it protects?

a fuse

voltage formula

V = I x R

current formula

I = V ÷ R

resistance formula

R = V ÷ I

power current

P = V x I

series resistance formula

RT = R1 + R2 …

parallel resistance formula

two resistors

RT = (R1 x R2) ÷ (R1 + R2)

component

main function

resistor

limitsc

capacitor

stores energy in an electric field

inductor

store energy in a magnetic field

diode

allows current primarily in one direction

transistor

switches or amplifies signals

transformer

changes AC voltage / increases or decreases voltage / transfers 2 or more energy

fuse

opens a circuit through melting element

relay

electrically controlled switch

AC current

alternating current

periodically reverses direction and changes its strength continuously over time

DC currrent

direct current

flows in one direction