This preview shows page 1. Sign up to view the full content.
Unformatted text preview: 11. Since the total force given by F = e(E + v × B ) vanishes, the electric ﬁeld E must be perpendicular to
both the particle velocity v and the magnetic ﬁeld B . The magnetic ﬁeld is perpendicular to the velocity,
so v × B has magnitude vB and the magnitude of the electric ﬁeld is given by E = vB . Since the particle
has charge e and is accelerated through a potential diﬀerence V , 1 mv 2 = eV and v = 2eV /m. Thus,
2
E=B 2eV
= (1.2T)
m 2(1.60 × 10−19 C)(10 × 103 V)
= 6.8 × 105 V/m .
(6.0 u)(1.661 × 10−27 kg/u) ...
View
Full
Document
 Fall '08
 SPRUNGER
 Physics, Force

Click to edit the document details