CAIE A-Level Physics 9.2.2 Using V = W/Q
Practise calculating potential difference, transferred energy or charge with V = W/Q, rearranging it and interpreting volts as energy per unit charge.
- Syllabus
- 2028–2030
- Course
- Physics 9702
- Level
- AS
Exam points
- calculate potential difference, energy transferred or charge using V = W/Q
- rearrange V = W/Q and maintain joules, coulombs and volts consistently
- interpret the meaning of a volt or energy transfer per charge in a circuit context
9.2.2—V = W / Q question 1
Two vertical metal plates are separated by a distance d in a vacuum, as shown in Fig. 7.1.
Fig. 7.1 (not to scale)
The potential difference (p.d.) between the plates is V. A nucleus with charge +q is initially at rest on plate X . The nucleus is accelerated by the uniform electric field from plate X along a horizontal path to plate Y .
State expressions, in terms of some or all of d, q and V, for:
the kinetic energy of the nucleus when it reaches plate Y .
kinetic energy =
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