a problem about moving particles

kolndom · Post by **kolndom** » Wed Oct 26, 2005 12:25 am

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

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wintercarver · Post by **wintercarver** » Wed Oct 26, 2005 2:08 am

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.

danty · Post by **danty** » Wed Oct 26, 2005 10:07 am

A correction: p~q^2 a^2

kolndom · Post by **kolndom** » Thu Oct 27, 2005 12:24 am

3qu danty