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WAEC Physics 2019 Paper

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Question : 30

Total: 49

An electron of mass 9.1 x 10‌−31 kg moves with a speed of 2.0 x 10‌6 ms‌−1 round the nucleus of an atom in a Circular path of radius 6.1 x 10(^{11}\) m. Determine the angular speed of the electron.

3.28 x 10‌16 rad s‌−1
8.55 x 10‌3 rad s‌−1
9.11 x 10‌13 rad s‌−1
5.22 x 10‌15 rad s‌−1

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