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CAIE A-Level Physics AS 9 Electricity Questions

Practise analysing charge flow, potential difference, resistance, power, resistivity and I-V behaviour, including temperature- and light-dependent components.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • analyse current as charge flow and apply Q = It, carrier quantisation and I = Anvq
  • calculate potential difference, energy transfer and electrical power from V, W, Q, I and R
  • apply V = IR, Ohm’s law and I–V characteristics to distinguish component behaviour
  • calculate resistance and resistivity from material, length and cross-sectional area
  • explain how temperature or light changes resistance in filament lamps, thermistors and LDRs

Covered syllabus points

9.1 Electric current9.2 Potential difference and power9.3 Resistance and resistivity

Question 1

[Maximum number: 1]

What could not be used to create an electric current?

A

alpha-particles

B

beta-particles

C

neutrons

D

protons

Question 2

[Maximum number: 1]

What is the definition of potential difference across a component?

A

energy transferred per unit charge

B

energy transferred per unit current

C

energy transferred per unit distance

D

energy transferred per unit time

Question 3

[Maximum number: 1]

Which equation is used to define resistance?

A

energy =( current )2×=(\text { current })^{2} \times resistance × time

B

potential difference = current × resistance

C

power =( current )2×=(\text { current })^{2} \times resistance

D

resistivity = resistance × area ÷ length

Question 4

[Maximum number: 1]

An electric current is formed by moving charge carriers.
What is not a possible charge on a charge carrier?

A

−4.8×10−19C-4.8 \times 10^{-19} \mathrm{C}

B

−2.4×10−19C-2.4 \times 10^{-19} \mathrm{C}

C

+1.6×10−19C+1.6 \times 10^{-19} \mathrm{C}

D

+3.2×10−19C+3.2 \times 10^{-19} \mathrm{C}

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