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Regents Physics
Worksheet 4.1.5 – Electrical Potential (10 points)
Show all work – multiple choice answers MUST be proven for full credit!
1.
-6
An object with 2.0 x 10 coulombs of charge is moved
-8
using 4.0 x 10 joules of work. What electrical potential is
generated by moving this charge?
4.
The graph below represents the relationship between
the work done on an object and its charge.
W
q
[0.02 V]
2.
-3
The slope of this graph represents: _________________
-5
A 5.0 x 10 kilogram object with a charge of 2.0 x 10
coulombs is positioned in an electric field such that its
electrical potential is 1.5 volts.
a.
If the charged object is released so that it can
move freely, how much kinetic energy (in joules)
will it gain after it is released?
5.
24 joules of work are done in moving 2.0 coulombs of
charge a distance of 3.0 meters in an electric field. What
is the potential difference through which the charge
moved?
(1) 48 V
(2) 16 V
-5
(3) 12 V
(4) 4.0 V
Proof: Show calculations.
[3.0 x 10 J]
b.
What maximum velocity will the object reach?
6.
[0.11 m/s]
3.
An object with an excess of 5 electrons is accelerated
through a potential difference of 15 volts. How much
kinetic energy (in electron-volts) will the object gain?
Two metal plates are charges so that the electrical
potential in the field between the plates is 100 volts.
How much energy is needed to move 1.0 coulomb of
negative charge from the positive plate to the negative
plate?
(1) 1.0 J
(2) 100 J
Proof: Show calculations.
[75 eV]
(3) 1.0 eV
(4) 100 eV
7.
The work needed to move 3.0 electrons through a
potential difference of 12 volts is
(1) 4.0 J
(2) 36 J
(3) 4.0 eV
(4) 36 eV
Proof: Show calculations.
8.
In which case is electrical potential energy increasing?
(1)
(2)
(3)
(4)
An electron moving away from a negative plate
Two protons moving toward each other.
A proton moving parallel to a negative plate.
An electron and proton moving closer together
Proof: Explain your reasoning.
9.
The order of magnitude of the electrical potential
generated when 5000 electron-volts of work are done on
10 electrons is
(1) 1
(2) 2
(3) 3
Proof: Explain your reasoning / show calculations.
(4) 4