Physics 5054 · O Level · Physical quantities and measurement techniques
Physical quantities and measurement techniques — practice question
A student finds the diameter of a thin wire.
The apparatus provided is:
• thin wire, $2.0\,\text{m}$ long
• wire cutters
• ruler
(a)[3]
Suggest how the student determines an accurate value for the diameter of the wire using only the apparatus listed.
Draw a diagram to show your method.
(b)[1]
A different student finds the diameter with another piece of apparatus. His value for the diameter is more accurate.
State the name of the different piece of apparatus he uses.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Cuts the wire into 5 (or more) sections” …