2.3.1 Alternating Current (AC) and Direct Current (DC)

• The magnitude of DC current changes over time.

  False
• What type of current flows in only one direction within a circuit?

  Direct Current (DC)
• How does the flow direction of DC compare to that of AC?

  Unidirectional vs Bidirectional
• What is the flow direction of DC current within a circuit?

  One direction
• What is the direction of current flow in Alternating Current (AC)?

  Changes periodically
• How does the flow direction of AC compare to that of DC?

  Bidirectional vs Unidirectional
• What type of current has a magnitude that remains constant over time?

  Direct Current (DC)
• What is the flow direction of Direct Current (DC)?

  Unidirectional
• How does the flow direction of DC differ from AC?

  It flows in one direction
• Alternating Current (AC) flows bidirectionally within a circuit.


  True
• AC is easier to transmit over long distances.
• Match the current type with its transmission characteristic:

  AC ↔️ Easier over long distances

  DC ↔️ Difficult over long distances
• What type of pattern does the magnitude of AC typically follow?

  Sinusoidal
• Arrange the following features based on their relevance to AC or DC:

  1️⃣ Bidirectional flow

  2️⃣ Varies periodically

  3️⃣ Constant magnitude

  4️⃣ Unidirectional flow
• Which type of current is commonly used in battery-powered devices?

  DC
• DC is easier to transmit over long distances than AC.

  False
• An inverter converts DC to AC.


  True
• A half-wave rectifier converts only one half of the AC waveform.
• What is the direction of current flow in Direct Current (DC)?

  One direction
• What happens to the magnitude of DC current over time?

  Remains constant
• The magnitude of DC current varies periodically.

  False
• What is the magnitude of DC current compared to AC current?

  Constant vs Varies periodically
• The magnitude of DC current remains constant over time.


  True
• What pattern does the magnitude of AC current typically follow?

  Sinusoidal
• The magnitude of AC current is constant over time.

  False
• Match the current type with its characteristic:

  Direct Current (DC) ↔️ Unidirectional flow

  Alternating Current (AC) ↔️ Bidirectional flow
• The magnitude of Alternating Current (AC) is constant over time.

  False
• The magnitude of DC remains constant
• Why is AC commonly used in mains electricity?

  Ease of transmission
• The flow direction of DC is bidirectional.

  False
• DC has a constant magnitude and flows in one direction.


  True
• Large home appliances like refrigerators use AC to operate.
• What is the device used to convert AC to DC?

  Rectifier
• Which type of rectifier produces a smoother DC output?

  Full-wave