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18.2. Uniform electric fields
A subsection of Physics, 9702, through 18. Electric fields
Listing 10 of 62 questions
A constant potential difference is applied between two horizontal metal plates. A charged oil droplet is held stationary by the electric field between the plates. horizontal metal plates charged oil droplet As some of the oil evaporates, the droplet loses mass and starts to accelerate. Its charge remains constant. In which direction does the droplet accelerate, and which change needs to be made to the separation of the plates in order to stop this acceleration?
9702_w20_qp_13
MCQ
2020
Paper 1, Variant 3
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A β– particle from a radioactive source is travelling in a vacuum with kinetic energy 460 eV. The particle enters a uniform electric field at a right-angle and follows the path shown in . path of β– particle β– particle kinetic energy 460 eV uniform electric field in the plane of the paper The direction of the electric field is in the plane of the paper. On , draw an arrow to show the direction of the electric field. Calculate the speed of the β– particle before it enters the electric field. speed = m s–1 Other β– particles from the same radioactive source travel outside the electric field along the same incident path as that shown in . State and briefly explain whether those β– particles will all follow the same path inside the electric field.
9702_s18_qp_21
THEORY
2018
Paper 2, Variant 1
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Questions Discovered
62