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Question 18M.1.HL.TZ1.32

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.1.HL.TZ1.32
Level HL Paper 1 Time zone TZ1
Command term Question number 32 Adapted from N/A
32.
[Maximum mark: 1]
18M.1.HL.TZ1.32

An electron of mass me orbits an alpha particle of mass mα in a circular orbit of radius r. Which expression gives the speed of the electron?

A.      2 k e 2 m e r

B.      2 k e 2 m a r

C.      4 k e 2 m e r

D.      4 k e 2 m a r

[1]

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A

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