Home › BECE (Ghana) › Science › Static Electricity › A person touches a charged dome and their hair s…
A person touches a charged dome and their hair stands on end. Why do the hairs push apart?
AThey all carry the same charge
BThey all carry opposite charges
CThey all lose their mass quickly
DThey all gain extra neutrons
Answer & Solution
Correct answer: A. They all carry the same charge
1. Touching the charged dome leaves the person carrying a charge as well.
2. Every strand of hair then carries that same charge.
3. Like charges repel, so each strand pushes every other strand away.
4. Opposite charges would pull the strands together instead of apart.
_Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), Van de Graaff generator_
Related questions
How can extra charge be taken away from an object safely?What is it called when electrons move from a charged object onto a neutral one?A storm cloud sits 2 km above the ground, and the lower surface of the cloud spans about 2A parallel-plate capacitor has a plate area of 200 cm^2 and a plate separation of 10 microA parallel-plate capacitor has its plate area doubled and its plate separation reduced by If the plate area of a parallel-plate capacitor is doubled while the plate separation stayIf the distance between the plates of a capacitor is doubled while the plate area and everThat same 200 microfarad camera-flash capacitor uses a 0.010 mm thick sheet of nylon (diel