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CAIE A-Level Physics 18.2.1 Uniform Field Strength

Practise calculating uniform electric field strength between parallel plates with E = delta V/delta d, rearranging it and interpreting direction and uniformity.

Syllabus
2028–2030
Course
Physics 9702
Level
A2

Exam points

  • calculate uniform electric field strength between parallel plates using E = ΔV/Δd
  • rearrange E = ΔV/Δd to determine potential difference or plate separation and use consistent units
  • interpret the direction and uniform nature of the field between charged plates

18.2.1—E = ∆V / ∆d to calculate the field strength of the uniform field between question 1

[Maximum number: 2]

Two parallel metal plates X and Y are separated by a distance of 0.041 m , as shown in Fig. 6.1.

Fig. 6.1

Fig. 6.1

There is a vacuum between the plates. An electron is at rest at the centre of plate X.
A potential difference (p.d.) of 58 kV is applied across the plates. This causes the electron to accelerate towards plate Y.

Calculate the electric field strength E between the plates. Give a unit with your answer.
E= unit

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