PHYS 1260 TEST BANK LATEST 2026 BUNDLED
EXAMS WITH COMPLETE CORRECT
SOLUTIONS FOR GUARANTEED PASS
◉A) F
Explanation — Via Fe=k|q1||q2|/r^2, if q1->2q1 and q2->2q2, and
(2r)^2=4r^2, then a factor of 4 cancels. Answer: Two charged particles
attract each other with a force . If the charges of both particles are
doubled, and the distance between them is also doubled, then the force
of attraction will be A) F. B) 2F. C) F/2. D) F/4. E) [none of these]
◉A) close together. Answer: The electrical force between charges is
strongest when the charges are A) close together. B) far apart. C) [either
of these] D) [need more information]
◉C) [both of these]. Answer: The electrical force between electric
charges depends only on their A) magnitude (strength of charge). B)
separation distance. C) [both of these] D) [neither of these]
◉B) 30 N/C. Answer: The electrical force on a 2-C charge is 60 N. The
electric field where the charge is located is A) 20 N/C. B) 30 N/C. C) 60
N/C. D) 120 N/C. E) 240 N/C
,◉D) a proton. Answer: The direction of the electric field is the same as
the direction of the electric (Coulomb) force exerted on A) a neutral test
charge. B) an electron. C) an atom. D) a proton. E) a molecule
◉D) [all of these]. Answer: Between a pair of equal and opposite
charges, field lines are A) directed from positive to negative. B) more
concentrated closer to the charges. C) vectors, with patterns that stem
from the inverse-square law. D) [all of these] E) [none of these]
◉C) 1 V
Explanation — Keep in mind that electric potential is primarily about
the response of a test charge to an electric field, and its close association
with potential energy (hence the name). So, same test charge, same
response. How much potential energy is stored in the field? A single
electronvolt (1 eV)!1. Answer: An electron is pushed into an electric
field where it acquires a 1 V electrical potential. If two electrons are
pushed the same distance into the same electric field, the electrical
potential of the two electrons is A) 0.25 V. B) 0.5 V. C) 1 V. D) 2 V. E) 4
V.
◉C) 10 J
Explanation — The charge will experience an electric force F=qE. This
force is compounded over a distance d to give an amount of work done,
W=Fd. The charge has a potential1 at this point in the form of 10 J of
, stored (potential) energy. Via conservation of energy, this stored energy
is converted to energy of movement—kinetic energy—when released.
Answer: Assume that 10 J of work is required to push a charge (initially
at rest) into an electric field. If the charge is then released, it flies back to
its starting position with a kinetic energy of A) zero. B) 5 J. C) 10 J. D)
more than 10 J. E) [need more information]
◉C) charge.. Answer: Electric potential, measured in volts, is the ratio
of electrical potential energy to the amount of electric A) current. B)
resistance. C) charge. D) voltage. E) [none of these]
◉B) 10 V. Answer: If 10 J of work is done in pushing a 1-C charge into
an electric field, its electric potential relative to its starting position is A)
less than 10 V. B) 10 V. C) more than 10 V. D) [none of these]
◉C) kinetic energy. Answer: Suppose 10 J of work is done in pushing a
1-C charge into an electric field. When released, the test charge's
potential energy will be converted to A) work. B) potential energy. C)
kinetic energy. D) gravitational energy
◉D) [all of these]. Answer: The net charge on a parallel-plate capacitor
depends on A) the area of the capacitor plates. B) the distance between
the capacitor plates. C) the medium between the capacitor plates. D) [all
of these] E) [none of these]
◉C) 6 joules
EXAMS WITH COMPLETE CORRECT
SOLUTIONS FOR GUARANTEED PASS
◉A) F
Explanation — Via Fe=k|q1||q2|/r^2, if q1->2q1 and q2->2q2, and
(2r)^2=4r^2, then a factor of 4 cancels. Answer: Two charged particles
attract each other with a force . If the charges of both particles are
doubled, and the distance between them is also doubled, then the force
of attraction will be A) F. B) 2F. C) F/2. D) F/4. E) [none of these]
◉A) close together. Answer: The electrical force between charges is
strongest when the charges are A) close together. B) far apart. C) [either
of these] D) [need more information]
◉C) [both of these]. Answer: The electrical force between electric
charges depends only on their A) magnitude (strength of charge). B)
separation distance. C) [both of these] D) [neither of these]
◉B) 30 N/C. Answer: The electrical force on a 2-C charge is 60 N. The
electric field where the charge is located is A) 20 N/C. B) 30 N/C. C) 60
N/C. D) 120 N/C. E) 240 N/C
,◉D) a proton. Answer: The direction of the electric field is the same as
the direction of the electric (Coulomb) force exerted on A) a neutral test
charge. B) an electron. C) an atom. D) a proton. E) a molecule
◉D) [all of these]. Answer: Between a pair of equal and opposite
charges, field lines are A) directed from positive to negative. B) more
concentrated closer to the charges. C) vectors, with patterns that stem
from the inverse-square law. D) [all of these] E) [none of these]
◉C) 1 V
Explanation — Keep in mind that electric potential is primarily about
the response of a test charge to an electric field, and its close association
with potential energy (hence the name). So, same test charge, same
response. How much potential energy is stored in the field? A single
electronvolt (1 eV)!1. Answer: An electron is pushed into an electric
field where it acquires a 1 V electrical potential. If two electrons are
pushed the same distance into the same electric field, the electrical
potential of the two electrons is A) 0.25 V. B) 0.5 V. C) 1 V. D) 2 V. E) 4
V.
◉C) 10 J
Explanation — The charge will experience an electric force F=qE. This
force is compounded over a distance d to give an amount of work done,
W=Fd. The charge has a potential1 at this point in the form of 10 J of
, stored (potential) energy. Via conservation of energy, this stored energy
is converted to energy of movement—kinetic energy—when released.
Answer: Assume that 10 J of work is required to push a charge (initially
at rest) into an electric field. If the charge is then released, it flies back to
its starting position with a kinetic energy of A) zero. B) 5 J. C) 10 J. D)
more than 10 J. E) [need more information]
◉C) charge.. Answer: Electric potential, measured in volts, is the ratio
of electrical potential energy to the amount of electric A) current. B)
resistance. C) charge. D) voltage. E) [none of these]
◉B) 10 V. Answer: If 10 J of work is done in pushing a 1-C charge into
an electric field, its electric potential relative to its starting position is A)
less than 10 V. B) 10 V. C) more than 10 V. D) [none of these]
◉C) kinetic energy. Answer: Suppose 10 J of work is done in pushing a
1-C charge into an electric field. When released, the test charge's
potential energy will be converted to A) work. B) potential energy. C)
kinetic energy. D) gravitational energy
◉D) [all of these]. Answer: The net charge on a parallel-plate capacitor
depends on A) the area of the capacitor plates. B) the distance between
the capacitor plates. C) the medium between the capacitor plates. D) [all
of these] E) [none of these]
◉C) 6 joules
