1. In an x-ray tube, electrons are accelerated in a uniform
electric field and then strike a metal target. Suppose an electron
starting from rest is accelerated in a uniform electric field
directed horizontally and having a magnitude of 2500N/C . The
electric field covers a region of space 12.0cm wide.
Part A
What is the speed of the electron when it strikes the
target?
Express your answer with the appropriate units.
Part B
How far does it fall under the...
An electron is released in a uniform electric field, and it
experiences an electric force of 2.2 ✕ 10-14 N downward.
What are the magnitude and direction of the electric field?
Magnitude
____________ N/C
Direction
upward, to the left, to the right or downward?
1) An evacuated tube uses an accelerating voltage of 44 kV to
accelerate electrons to hit a copper plate and produce X-rays.
Ignoring relativistic effects, what would be the maximum speed of
these electrons?
2) A battery-operated car uses a 12.0-V system. Find the charge
the batteries must be able to move in order to accelerate the 600
kg car from rest to 30.0 m/s.
3) I want to accelerate an electron to the speed of sound (343
m/s) by...
An electron is initially is at rest in a uniform electric field
E in the negative y direction and a uniform magnetic field B in the
negative z direction. Solve the equations of motion given by the
Lorentz Force and show the trajectory of the electron is found
as:
x(t)= (cE / wB) * (wt - sintwt)
y(T)=(cE / wB) * (1 - coswt)
where w=(eB/mc)
An electron is to be accelerated in a uniform electric field
having a strength of 4.58×106 V/m. (a) What energy in keV is given
to the electron if it is accelerated through 0.562 m? (b) Over what
distance would it have to be accelerated to increase its energy by
58.0 GeV? Draw a diagram and show your parameters and all your
work.
5. An electron moves to the right, entering a region that has a
uniform electric field directed at you. The direction of the force
perceived by the electron is:
a. down
b. up
c. on the right
d. towards you
e. None of the above
In a cathode ray tube, electrons are accelerated from rest by a
constant electric force of magnitude 6.40 × 10−17 N
during the first 4.40 cm of the tube’s length; then they move at
essentially constant velocity another 45.0 cm before hitting the
screen.
a.How long does it take them to travel the length of the
tube?
b.Find the speed of the electrons when they hit the screen.
c.How long does it take them to travel the length of the...
An electron with speed 2.75×107 m/s is traveling
parallel to a uniform electric field of magnitude
1.20×104 N/C .
How far will the electron travel before it stops?
How much time will elapse before it returns to its starting
point?
An
electron (charge =-1.6*10^-19C) moves on a path parallels but
opposing a uniform electric field of strengths 2.3 N/C. How much
work is done on the on the electron a sit moved 20cm? How much work
is done on the electron if it moves perpendicular to the electric
field?
Each of the electrons in the beam of a television tube has a
kinetic energy of 11.0 keV. The tube is oriented so that
the electrons move horizontally from geomagnetic south to
geomagnetic north. The vertical component of Earth's magnetic field
points down and has a magnitude of 50.0 μT.
1.What is the acceleration of a single electron due to the magnetic
field?
2.How far will the beam deflect in moving 20 cm through
the television tube?