1.1.1 Current and Charge

• What is electric current measured in?

  Amperes
• Electric current is measured in amperes.
• What are the two types of electric charge?

  Positive and negative
• What is the approximate magnitude of charge for both the proton and electron?

  $1.602 \times 10^{ - 19}$ coulombs
• The electron carries a negative charge.
• Order the two types of charge flow in an electrical circuit by direction:

  1️⃣ Conventional Current: Positive to Negative

  2️⃣ Electron Flow: Negative to Positive
• The formula for electric current is I = Q / t
• In the formula for electric current, `t` represents time
• The magnitude of charge for both a proton and an electron is approximately 1.602 × 10^-19
• In an electrical circuit, charge flows through a conductive material, creating a continuous loop
• Order the types of charge flow in an electrical circuit based on direction:

  1️⃣ Conventional current: Positive to negative

  2️⃣ Electron flow: Negative to positive
• A mobile phone charger uses a moderate amount of current
• What does the symbol 'Q' represent in the electric current formula?

  Charge
• Like charges repel each other, while opposite charges attract
• Match the particle with its charge:

  Proton ↔️ Positive

  Electron ↔️ Negative
• What happens when two positive charges interact?

  They repel
• Electric current is measured in amperes
• `I` represents electric current in amperes
• Like charges attract each other

  False
• Positive charges repel other positive charges
• What does conventional current describe in terms of charge flow?

  Positive charge flow
• Match the type of charge flow with its direction:

  Conventional Current ↔️ Positive to Negative

  Electron Flow ↔️ Negative to Positive
• Lightning involves a rapid flow of charge between a cloud and the ground
• Electric current is defined as the rate of flow of charge
• Match the quantity with its symbol and unit:

  Electric Current ↔️ I, Amperes

  Charge ↔️ Q, Coulombs

  Time ↔️ t, Seconds
• The proton carries a positive charge.
• Like charges repel each other, while opposite charges attract
• Match the charge type with its interaction:

  Positive ↔️ Attracts negative

  Negative ↔️ Attracts positive
• What is electric current measured in?

  Amperes
• What is `Q` in the formula for electric current?

  Charge in coulombs
• Which particle carries a positive charge?

  Proton
• Match the charge type with its interaction:

  Positive ↔️ Attracts negative charge

  Negative ↔️ Repels negative charge
• Electron flow describes the movement of electrons from the negative to the positive terminal
• What type of charge and current occurs in lightning?

  High charge, high current