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Week 9 Quiz
Enter your last name starting with a capital letter (e.g. Urminsky)
A beam of electrons is accelerated through a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?
An electron has an initial velocity to the south but is observed to curve upward as the result of a magnetic field. The direction of the magnetic field is
To the west
To the east
A charged particle moves across a constant magnetic field. The magnetic force of this particle
changes the particle's speed
causes the particle to accelerate
is in the direction of the particle's motion
both a and b are correct
A particle carrying a charge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been
twice the original radius
four times the original radius
one-half the original radius
one-fourth the original radius
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