Current and Circuits Power and control all rolled into one fun filled adventure…not really.
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Transcript of Current and Circuits Power and control all rolled into one fun filled adventure…not really.
Current and CircuitsCurrent and Circuits
Power and control all rolled into Power and control all rolled into one fun filled adventure…not one fun filled adventure…not
really really
What Is A Current? What Is A Current? • CurrentCurrent: the rate at which : the rate at which
charges pass a given pointcharges pass a given point
Made by electrons moving in Made by electrons moving in a wirea wire
AC/DC...what does that AC/DC...what does that mean?mean?
• AC/DCAC/DC: explains how current gets : explains how current gets movedmoved
DCDC: Direct Current (one-direction): Direct Current (one-direction)
ACAC: Alternating Current (bi-directional): Alternating Current (bi-directional)
VoltageVoltage
• VoltageVoltage: the number : the number of electrons that are of electrons that are in an energy sourcein an energy source
Voltage can varyVoltage can vary
• Depends on Potential EnergyDepends on Potential Energy
ResistanceResistance• ResistanceResistance: opposition : opposition
to the flow of charge to the flow of charge
Expressed in ohms
ΏAs resistance increases…current decreases!!!!As resistance increases…current decreases!!!!
Ohm’s Law Ohm’s Law • Amperes (A) = Amperes (A) = voltsvolts (V) (V) ohms (Ώ)ohms (Ώ)
I = Current I = Current
V = VoltageV = Voltage
R = ResistanceR = Resistance
I = I = VV RR
Electric PowerElectric Power• The rate at which electrical energy is The rate at which electrical energy is
used to do workused to do work
Expressed in Watts (W)Expressed in Watts (W)
Power = voltage x currentPower = voltage x current
P = V x IP = V x I
CircuitsCircuits• Complete, closed path through which Complete, closed path through which
electric charges flowelectric charges flow
Closed Open
Two Types of CircuitsTwo Types of Circuits• 1. 1. SeriesSeries: all parts are connected in one loop: all parts are connected in one loop
Types Of CircuitsTypes Of Circuits
• 2. 2. ParallelParallel: different loads are : different loads are located on separate brancheslocated on separate branches