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a problem about moving particles

Posted: Wed Oct 26, 2005 12:25 am
by kolndom
would u please help me with this problem?
thank u in advance :)

A charged particle, A, moving at a speed much less than c, decelerates uniformly. A second particle, B, has one-half the mass, twice the charge, three times the velocity, and four times the acceleration of particle A. According to classical electrodynamics, the ratio PB/PA of the powers radiated is
(A) 16
(B) 32
(C) 48
(D) 64
(E) 72


Posted: Wed Oct 26, 2005 2:08 am
by wintercarver
this is a radiation problem for a point particle. the answer will be in griffiths electrodynamics. the basic idea is p ~ q^2 a^4 , so the ratio gives 64.

Posted: Wed Oct 26, 2005 10:07 am
by danty
A correction: p~q^2 a^2

Posted: Thu Oct 27, 2005 12:24 am
by kolndom
3qu danty