solving circuits

Parallel circuit: 
total resistance: 1/Rt = 1/R1 + 1/R2 + 1/R3
intensity: It=V/Rt
V in every resistor: I1*R1; I2*R2 ; I3*R3
I in every resistor: I1=V/R1 ; I2=V/R2 ; I3=V/R3
Voltage drop: V=I*R ( V is the same in every resistor)

Series circuit:
total resistance: Rt= R1+R2+R3
intensity:  It=V/Rt

V in every resistor: V1=It*R1 ; V2=It*R2 ; V3=It*R3

I in every resistor:  in every resistor= It

Voltage drop: V=I*R

to calculate the total resistance you add them normally (Rt= R1+R2+R3)

Mixed circuit:

total resistance: Rt= Rbc+Rdi+Rkj and 1/Rdi = 1/Ref + 1/Rgh

intensity: It=V/Rt

V in every resistor: Vbc= It*Rbc; Vef= It*Rdi; Vgh=Rdi*It; Vkj=It*Rkj

I in every resistor: Ibc=Vbc/Rbc; Ief=Vef/Ref; Igh=Vgh/Rgh, Ikj=Vkj/Rkj

Voltage drop: V=I*R

To calculate the total resistance you need to calculate the Rt between D and I using the method of 1/Rdi = 1/Ref + 1/Rgh. then you add the other resistance ( 8 and 6) to the answer.
To calculate the intensity you use the Ohm's law, 12v/Rt

electricity

ELECTRICITY

Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge.


VOLTAGE is an electromotive force or potential difference expressed in volts.

RESISTANCE of an object is a measure of its opposition to the flow of electric current. Omh¨s






INTENSITY  isthe magnitude of an electric current as measured by the quantity of electricity crossing a specified area of equipotential surface per unit time.Amperes.






OMH´S LAW: a law stating that electric current is proportional to voltage and inversely proportional to resistance.

circuits

CIRCUITS

The circuit components are the batteries, lamps, switches, resistors, leds, motors and wires.
batteries provide the volts to the circuit.


lamps give the light

switches open and close the circuit so the lamps turn on and off.

resistors produce the amperes stopping the voltage with the ohms

leds are a light emitting diodide

Types of circuits:

Parallel circuit is a closed circuit in which the current divides into two or more paths before recombining to complete the circuit. Each load connected in a separate path receives the full circuitvoltage, and the total circuit current is equal to the sum of the individual branch currents.

Mxed  is any integrated circuit that has both analogcircuits and digital circuits on a single semiconductor die.


Series is a closed circuit in which the current follows one path, as opposed to a parallelcircuit where the circuit is divided into two or more paths. In a series circuit, the current through each load is the same and the total voltage across thecircuit is the sum of the voltages across each load.