IB Physics HL D 2 14 Hl Electric Potential Questions
Practise IB Physics HL D.2.14 Electric potential energy and work with questions connecting electric fields, potential difference and work.
- Syllabus
- First assessment 2025
- Course
- Physics HL
- Level
- HL
Exam points
- Use Ve=kQ/r with zero potential defined at infinity.
- Calculate electric potential or potential difference from charge, distance and work per unit charge.
- Sketch and interpret how electric potential varies with distance for point charges and conducting spheres.
- Apply scalar potential superposition to determine total potential or unknown charge.
IB Physics HL D 2 14 Hl Electric Potential Questions question 1
[Maximum number: 2]
A metal sphere is charged positively and placed far away from other charged objects. The electric potential at a point on the surface of the sphere is 53.9 kV .
The electric potential at a point a distance 2.8 m from the centre of the sphere is 7.71 kV . Determine the radius of the sphere.
use of V r= constant 0.40 m
Marking guidance:
Allow [1] max if r+2.8 used to get 0.47 m .
Allow [2] marks if they calculate Q at one potential and use it to get the distance at the other potential.
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