A steady beam of alpha particles (q = +2e) traveling with constant kinetic energy 20 MeV carries

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A steady beam of alpha particles (q = +2e) traveling with constant kinetic energy 20 MeV carries a current of 0.25μA.

(a) If the beam is directed perpendicular to a flat surface, how many alpha particles strike the surface in 3.0 s?

(b) At any instant, how many alpha particles are there in a given 20 cm length of the beam?

(c) Through what potential difference is it necessary to accelerate each alpha particle from rest to bring it to energy of 20 MeV?

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Fundamentals of Physics

ISBN: 978-0471758013

8th Extended edition

Authors: Jearl Walker, Halliday Resnick

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Question Posted: Jan 19, 2011 05:07 AM

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A steady beam of alpha particles (q = +2e) traveling with constant kinetic energy 20 MeV carries

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a The charge that strikes the surface in time At is given by Aq i At where i is the current Since ea...View the full answer

Fundamentals of Physics

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