11.1 Electric Current

• What is electric current defined as?

  Rate of charge flow
• Conventional current flows in the same direction as electron flow.

  False
• Conventional current flows from the positive terminal to the negative terminal in a circuit.


  True
• What is the primary characteristic of AC current?

  Periodically reverses direction
• DC is sourced from batteries, solar cells, and DC generators
• AC is sourced from AC generators
• In the formula for electric current, 'I' represents the current in Amperes
• Conventional current flows in the opposite direction to the flow of electrons
• In the formula I = ΔQ / Δt, 'I' is measured in Amperes
• Match the term with its definition, unit, and formula:

  Electric Current ↔️ Rate of charge flow ||| Ampere (A) ||| I = ΔQ / Δt

  Charge ↔️ Amount of electric charge ||| Coulomb (C) ||| ΔQ = I * Δt

  Time Interval ↔️ Duration of current flow ||| Second (s) ||| Δt = ΔQ / I
• Match the characteristic with either conventional current or electron flow:

  Conventional Current ↔️ Defined as the flow of positive charge

  Electron Flow ↔️ Actual flow of negatively charged electrons
• Arrange the following characteristics of DC and AC current to differentiate between them:

  1️⃣ DC flows in a constant direction

  2️⃣ AC periodically reverses direction

  3️⃣ DC has constant magnitude and direction

  4️⃣ AC has a sinusoidal waveform

  5️⃣ DC sources include batteries

  6️⃣ AC sources include AC generators
• What is the definition of DC (Direct Current)?

  Flows in a constant direction
• What is the definition of AC (Alternating Current)?

  Periodically reverses direction
• What is the formula for electric current?

  I = ΔQ / Δt
• What is the unit for time interval in the formula for electric current?

  Second
• Which direction does conventional current flow in a circuit?

  Positive to negative
• Match the type of current with its source:

  DC ↔️ Batteries, solar cells, DC generators

  AC ↔️ AC generators
• AC periodically reverses direction.


  True
• What are the characteristics of AC current?

  Sinusoidal waveform, oscillating magnitude
• DC has a constant magnitude and direction.


  True
• What is the relationship between current, voltage, and resistance according to Ohm's Law?

  Current is directly proportional to voltage and inversely proportional to resistance
• What is the unit of electric current?

  Ampere (A)
• Current is measured in Amperes (A), charge in Coulombs (C), and time in seconds (s).

  True
• Electric current is the rate at which electric charge flows through a circuit
• What is the historical convention for the direction of conventional current?

  Flow of positive charge
• What is the unit for voltage?

  Volts (V)
• What are the three variables in Ohm's Law?

  Current, voltage, resistance
• The potential difference that drives current is called voltage
• Resistance is inversely proportional to current.


  True
• What is the relationship between current and resistance in Ohm's Law?

  Inversely proportional
• Match the quantity with its unit:

  Electric Current ↔️ Ampere (A)

  Charge ↔️ Coulomb (C)

  Time Interval ↔️ Second (s)
• The formula for electric current is I = ΔQ / Δt
• Conventional current is defined as the flow of positive charge, which is opposite to the actual flow of electrons
• Conventional current is defined as the flow of positive charge, which is opposite to the flow of electrons
• DC current is characterized by its constant magnitude and direction
• DC has a constant magnitude and direction.


  True
• AC has a sinusoidal waveform and oscillating magnitude.


  True
• The unit for electric charge is the Coulomb.


  True
• Conventional current was established before the discovery of the electron.


  True