Differences and examples

• What is direct current (DC)?

  Electrons move in a single direction
• How does the flow of electrons in DC compare to a street?

  It flows like a one-way street
• How do circuit diagrams indicate electron movement in AC and DC circuits?

  With arrows indicating electron movement
• What is the direction of electron flow in DC circuits?

  Single direction
• What does the term "direction change" refer to in DC circuits?

  Constant electron flow in one direction
• How does electron flow in AC circuits?

  Changes direction regularly
• What does the term "direction change" refer to in AC circuits?

  Regular intervals of electron flow reversal
• What is the name of the type of current shown in the first graph?

  Alternating Current
• What is the definition of alternating current (AC)?

  AC is when electrons change direction regularly.
• What is the key difference between alternating current (AC) and direct current (DC)?

  • AC changes direction periodically, DC flows in a constant direction
  • AC is commonly used for power transmission, DC is used for electronics and batteries
  • AC can be easily transformed to different voltages, DC cannot
• What are the advantages of using direct current (DC) over alternating current (AC)?

  DC is more efficient for electronic devices and batteries
• What do electrons represent in the analogy of AC?

  Little cars changing direction
• What are the key differences between AC and DC circuits?

  • DC: Electrons flow in one direction
  • AC: Electrons flow back and forth
  • DC: Direction change is constant
  • AC: Direction changes at regular intervals
• How is alternating current (AC) described metaphorically?

  As a two-way street for electrons
• What is the name of the type of current shown in the second graph?

  Direct Current
• How do electrons behave in alternating current?

  They go back and forth continuously
• Why do cell phones require DC?

  The battery provides the necessary DC for operation
• What does AC stand for in electricity?

  Alternating Current
• What is the game that electrons are playing in AC?

  Switching lanes all the time
• What is alternating current (AC)?

  Electrons change direction regularly through a circuit
• What is the symbol for Direct Current (DC)?


  -
• What are the characteristics of direct current (DC)?

  • Flow Direction: Single direction
  • Example Source: Batteries
• What is the graphical representation of alternating current (AC)?

  Wave
• How does the magnitude of DC change over time?

  Constant
• What is the graphical representation of direct current (DC)?

  Straight line
• How can you convert AC to DC?

  • Use a rectifier circuit to convert the AC waveform to a DC waveform
  • Rectifiers use diodes to allow current to flow in only one direction
• What is the symbol for Alternating Current (AC)?

  ~
• What is the primary use of light bulbs powered by AC?

  Illumination in homes and offices
• How can alternating current (AC) be visualized?

  Like a two-way street with traffic switching lanes.
• Where does the electricity from wall plugs in houses come from?

  It is AC electricity
• What does Direct Current (DC) power?

  Many common devices in everyday life
• What type of devices do batteries typically power?

  Small electronics like radios and toys
• Does AC change direction?

  Yes
• What do flashlights use to illuminate light bulbs?

  Direct Current (DC)
• How does the magnitude of AC change over time?

  Periodically
• What are the key characteristics of alternating current (AC)?

  • Flow direction changes regularly
  • Example source is power outlets
• How is alternating current (AC) different from direct current (DC)?

  AC electrons change direction regularly, while DC electrons flow in a single direction
• Does DC change direction?

  No
• What type of current powers many common devices?

  Alternating Current (AC)
• How do washing machines utilize AC?

  They power the motors for washing cycles