Current, Resistance and Potential Difference

• What is potential difference also known as?

  Voltage
• What does potential difference represent in a circuit?

  Energy difference carried by charges between locations
• What is required for electric charge to flow through a closed circuit?

  A source of potential difference must be included
• What components can serve as sources of potential difference?

  Batteries and power packs
• What do resistors do in a circuit?

  They remove energy from moving charges
• What does the current (I) through a component depend on?

  Resistance (R) and potential difference (V)
• How does resistance affect current for a given potential difference?

  Higher resistance results in lower current
• What happens to current as resistance increases for a constant potential difference?

  Current decreases
• What is the relationship between potential difference, current, and resistance?

  V = I × R
• If the potential difference is $10 \text{ V}$ and the resistance is $5 \text{ Ω}$, what is the current?


  $2 \text{ A}$
• How does the potential difference across a component relate to the current flowing through it?

  It is directly proportional to the current
• What does a greater potential difference indicate about the energy of charges?

  It indicates more energy per charge
• What is the effect of a higher resistance on the potential difference required for a specific current?

  It requires a higher potential difference
• How does the current change if the potential difference is doubled while resistance remains constant?

  The current also doubles
• What is the significance of the relationship between current, resistance, and potential difference?

  It helps in designing and analyzing circuits
• What is the formula for calculating potential difference?

  Potential difference = Current × Resistance
• If a circuit has a resistance of $10 \text{ Ω}$ and a current of $3 \text{ A}$, what is the potential difference?


  $30 \text{ V}$
• What happens to the current if the resistance is increased while keeping the potential difference constant?

  The current decreases
• Why is it important to understand the relationship between current, resistance, and potential difference?

  It is crucial for effective circuit design