Question

1. An electron is to be accelerated in a uniform electric field
having a strength of 8 ×10^{6} V/m . What energy in keV is
given to the electron if it is accelerated through 0.8 m

2. What capacitance is needed to store 6.14 μC of charge at a
voltageof 120 V? Give answer in terms of 10^{-8} F

3. In open heart surgery, a much smaller amount of energy will defibrillate the heart. Heart defibrillators store 39 J of energy and the voltage is applied to a 8 μFcapacitor. Find the amount of stored charge. Give answer in terms of mC.

4. What is the potential 0.52×10^{-10} m from a proton
(the average distance between the proton and electron in a hydrogen
atom)?

5. A 0.3 μF and a 11 μF capacitors are connected in series. Then the pair are connected in parallel with a 3.4 μF capacitor. What is the equivalent capacitance? Give answer in terms of mF

Answer #1

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An electron is initially at rest in a uniform electric field
having a strength of 1.95 × 106 V/m. It is then released
and accelerated by the presence of the electric field.
What is the change in the electron’s kinetic energy, in
kiloelectron volts, if it travels over a distance of 0.25 m in this
field?
Over how many kilometers would it have to be accelerated in the
same electric field to increase its kinetic energy by 65 GeV?
&...

1. Find the capacitance of a parallel plate capacitor
having plates of area 3 m2 that are separated by 0.08 mm
of Teflon. Give answer in terms of 10-7 F.
2. What is the average power output of a heart
defibrillator that dissipates 472 J of energy in 7 ms? Give answer
in terms of 104 W.
3. What is the strength of the electric field between
two parallel conducting plates separated by 1 cm and having a
potential difference...

An electron is to be accelerated in a uniform electric field
having a strength of 1.8

1.
a doubly charged ion is accelerated to an energy of 22 keV by the
electric field between two parallel conducting plates separated by
9 cm. what is the electric field strength between the plates? give
answer in terms of 10^5 V/m.
2. an electrostatic paint sprayer has a potential of 25.0 kV
that repels paint droplets onto a grounded object. what charge must
a 0.75 mg drop of paint have to arrive at the object with a speed
of...

Two particles, an electron and a proton, are initially at rest
in a uniform electric field of magnitude 478 N/C. If the particles
are free to move, what are their speeds (in m/s) after 52.0 ns?
Give the speed of both the electron and
proton.

An electron is accelerated by a constant electric field of
magnitude 315 N/C.
(a)
Find the acceleration of the electron.
m/s2
(b)
Use the equations of motion with constant acceleration to find
the electron's speed after 1.00 10-8 s,
assuming it starts from rest.
m/s

A proton is accelerated through a potential difference of 10 kV
and enters a uniform magnetic field at right angles. Calculate the
value of the magnetic flux density necessary to move the proton in
a circular path of radius 10 mm. [6]
A piece of wire of cross-sectional area A and resistivity ρ is
bent into a circular loop of radius r and placed in a magnetic
field with its plane at right angles to the field. Determine the
magnitude...

A 165 μF capacitor is used in a circuit.
How much energy, in joules, is stored in it when 117 V is
applied?
&
A nervous physicist worries that the two metal shelves of his
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charged by static electricity, perhaps produced by friction.
What is the capacitance of the empty shelves if they have area
1.4 × 103 cm2 and are 0.22 m apart in F?
What is the potential...

Now let’s look at a specific problem involving series and
parallel combinations of capacitors. Two capacitors, one with
C1=6.0μF and the other with C2=3.0μF, are connected to a potential
difference of Vab=18V. Find the equivalent capacitance, and find
the charge and potential difference for each capacitor when the two
capacitors are connected (a) in series and
(b) in parallel.
PART A: Repeat this example
for Vab=18V and C1=C2=10μF. What is the equivalent
capacitance for the capacitors when they are connected in...

What magnitude point charge creates a 5,156 N/C electric field
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Common static electricity involves charges ranging from
nanocoulombs to microcoulombs. How many electrons must be removed
from a neutral object to leave a net charge difference of 0.83 μC?
Give your answer in terms of 1012 electrons.

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