ASPhysicsEdexcelExam Questions3. Electric CircuitsCurrent, Potential Difference, Resistance & Power

Current, Potential Difference, Resistance & Power (Edexcel AS Physics): Exam Questions

Exam code: 8PH0

1 hour14 questions

Select a download format for Current, Potential Difference, Resistance & Power

Scroll for more

Select an answer set to view for
Current, Potential Difference, Resistance & Power

Easy
Medium
1
1 mark

Part of an electric circuit is shown.

q1-june-2018-9ph0-01-edexcel-as-a-level-phy

What is the current shown by the ammeter?

  • 3 A

  • 4 A

  • 5 A

  • 6 A

Choose your answer

2
1 mark

Which of the following graphs shows how the current varies with potential difference for a filament lamp?

q5-june-2018-9ph0-01-edexcel-as-a-level-phy

    Choose your answer

    3
    1 mark

    The graph shows how the potential difference V varies with the current I for a circuit component.

    Graph of potential difference V against current I showing a curve passing through the origin, very flat at low I, then curving steeply upwards as I increases.

    Which of the following could be the circuit component?

    • ohmic resistor

    • filament lamp

    • thermistor

    • diode

    Choose your answer

    4
    1 mark

    Which of the following units is equivalent to the coulomb?

    • A s−1

    • J A−1

    • J V−1

    • W V−1

    Choose your answer

    5
    1 mark

    The graphs show how the current I varies with the potential difference V for three electrical components.

    Three I-V graphs labelled X, Y and Z, each with current (I) on the vertical axis and potential difference (V) on the horizontal axis. Graph X: a curve through the origin with a gradient that decreases at higher voltages — the curve bows towards the horizontal axis. Graph Y: a straight line through the origin with a constant positive gradient. Graph Z: initially zero current, then a steep exponential rise above a threshold voltage.

    Which row correctly identifies each component?

    Ohmic conductor

    Diode

    Filament lamp

    A

    X

    Z

    Y

    B

    X

    Y

    Z

    C

    Y

    Z

    X

    D

    Y

    X

    Z

      Choose your answer

      1
      1 mark

      Two resistors are connected in parallel and the current in one of them is 2.0 A, as shown.

      screenshot-2023-01-03-at-14-44-20

      Which of the following is the current I in ampere?

      • 3.0

      • 4.0

      • 5.0

      • 6.0

      Choose your answer

      2
      1 mark

      Which of the following is the total resistance of the resistors in parallel?

      pqCx-58a_screenshot-2023-01-03-at-14-44-20

      • 20 Ω

      • 40 Ω

      • 90 Ω

      • 180 Ω

      Choose your answer

      3
      1 mark

      A circuit consists of three identical 1.5 V bulbs connected to two 1.5 V cells.  

      q4-june-2019-9ph0-01-edexcel-as-a-level-phy

      The switch is closed. Which row describes the change in brightness of bulb Y and bulb Z? 

       

      Y

      Z

      A

      brighter 

      brighter 

      B

      brighter 

      dimmer 

      C

      dimmer 

      brighter 

      D

      dimmer 

      dimmer 

        Choose your answer