International A Level (IAL)PhysicsEdexcelExam Questions2. Waves & ElectricityCurrent, Potential Difference, Resistance & Power

Current, Potential Difference, Resistance & Power (Edexcel International A Level (IAL) Physics): Multiple Choice Questions

Exam code: YPH11

58 mins16 questions

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Current, Potential Difference, Resistance & Power

Easy
Medium
1
1 mark

A graph of current against potential difference for an electrical component is shown.

q6-wph12-02-june-2021-edexcel-int-as-a-level-phy

Which component would give this graph?

  • diode

  • filament bulb

  • ohmic conductor

  • thermistor

Choose your answer

2
1 mark

Which of the following units is equivalent to the volt?

  • J s–1

  • W s–1

  • J C–1

  • W C–1

Choose your answer

3
1 mark

The graph shows how potential difference V varies with current I for an electrical component.

q1-wph12-02-oct-2021-edexcel-int-as-and-a-level-phy

Which electrical component is represented by this graph?

  • diode

  • filament lamp

  • ohmic conductor

  • thermistor

Choose your answer

4
1 mark

The unit of electric potential can be written as J C−1.

Which of the following is the equivalent expression in SI base units?

  • kg m2 s−2

  • kg m2 s−2 A−1

  • kg m2 s−3 A−1

  • kg m s−3 A−1

Choose your answer

5
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

6
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

7
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

    The unit of resistance is the ohm.

    Which of the following is equivalent to the ohm?

    • J C−2 s

    • J C2 s−1

    • J C−1 s−1

    • J C s

    Choose your answer

    2
    1 mark

    Which of the following derived units can be expressed in SI base units as kg m2 s–3 ?

    • coulomb

    • joule

    • volt

    • watt

    Choose your answer

    3
    1 mark

    The graph shows how current I varies with potential difference V for an electrical component.

    q8-wph12-02-jan-2022-edexcel-int-as-a-level-phy

    Which component is represented by this graph?

    • Diode

    • Filament lamp

    • Ohmic conductor

    • Thermistor

    Choose your answer

    4
    1 mark

    A light dependent resistor (LDR) and a fixed resistor are connected in a circuit, as shown.

    q10-wph12-02-jan-2022-edexcel-int-as-a-level-phy

    The intensity of the light incident on the LDR is increased.

    Which of the following does not take place as the light intensity is increased?

    • The current in the circuit increases.

    • The potential difference across the fixed resistor increases.

    • The total power dissipated in the circuit decreases.

    • The resistance of the LDR decreases.

    Choose your answer