SEMI-FINALS

• electrons move from one point to another., electrons move from one point to another.

  electric potential energy
• , electrons move from one point to another.

  electric potential energy
• movement is possible

  electric field
• velocity of this motions

  drift theory
• move to any direction


  electrons
• . If this flow is regulated and made to move continuously in one direction, then the flow becomes an

  electric current
• . Drift velocity and electric current are

  directly proportional
• I

  Electric current
• q


  Amount of charges that pass through
• t

  Unit of Time
• is any materials that allows the free flow of electric current.

  electric conductor
• limitation to current flow

  resistance
• Resistance and electric current

  inversely proportional
• an intrinsic property of the material that describes how it resists the electric current flowing through it

  Electrical resistivity
• reduced by an increase in the electrical resistivity of the material, whereas a decrease in the resistivity allows more current to flow through the material.

  current flow
• material results in a lower resistance offered by the material and a higher current flow through it.

  electrical conductivity
• "Fat" conductors allow more charges to pass through them, which means more current can flow.

  cross-sectional area
• factors affecting electric current

  electrical resistivity

  electrical conductivity

  temperature

  length

  cross-sectional area
• The unit of resistance of resistance

  ohm
• – what the voltage source provides to a circuit. It is the “push” given to the electric charges for them to flow from the source to the components of the circuit.

  Electromotive Force
• an actual consideration of the potentials in the circuit. The existence of also identifies the flow of charges through the circuit.

  Potential difference
• discovered the relationship among voltage, current, and resistance

  Georg Simon Ohm
• Georg Simon Ohm discovered the relationship among

  voltage, current, and resistance
• Georg Simon Ohm discovered the relationship among voltage, current, and resistance


  1827
• The pathway for the current to move to and from the source and the appliance is called an

  electric circuit
• allow the current to flow from the source of the current to the load where the current is needed. Figure 4.5 shows an example of this type of circuit

  Closed circuits
• have gap(s) where current cannot flow. Thus, electric current cannot be delivered to the load where it is needed.

  Open circuits
• make it easy to draw circuits. simplify your representation of a circuit.

  Schematic diagrams
• an electronic component used to provide a specific amount of resistance.

  resistor
• , all components are connected using a single pathway.

  a series circuit
• branches to allow current to pass through more than one path, unlike in the series circuit.

  Parallel circuits
• components show the relationship between voltage and the current as in Ohm's law.

  Ohmic
• Examples of ohmic components

  resistors and ordinary conducting wires.
• unit of current

  A
• UNIT FOR CHARGE

  C
• UNIT FOR CAPACITORS

  C/V or F
• electric component that temporarily stores charges within a circuit.

  ·        

  ·        

  CAPACITOR
• Inside it are two conducting plates facing each other and separated by an insulator referred

  a dielectric
• constructed by inserting an insulator to form a gap along the path of a conductor

  Capacitors
• amount of charges stored in a capacitor per unit of electric potential

  ·        

  CAPACITANCE