PHYS 1260 EXAM 1 2025 UPDATE QUESTIONS AND CORRECT VERIFIED
ANSWERS ALREADY GRADED A+ (BRAND NEW VISION)
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. - answersD) a proton.
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] - answersD) [all of these]
Suppose 10 J of work is done in pushing a 1-Ccharge 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. - answersC) kinetic energy.
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] - answersD) [all of these]
If you stretch a copper wire so that it is thinner, the resistance between its ends
A) decreases.
B) remains unchanged.
C) increases. - answersC) increases.
When you turn on a lamp, the initial current in its filament is greater at first, rather than a
moment later, which indicates
A) something is faulty.
B) a time delay for current attaining its average speed.
C) increased temperature means increased resistance.
D) nothing of interest. - answersC) increased temperature means increased resistance.
Just as gravity is the study of a wide range of gravitational interactions, electricity is the study of
a wide range of
A) electrical charges.
B) electrical forces.
C) electrical interactions.
D) [none of these] - answersC) electrical interactions.
ANSWERS ALREADY GRADED A+ (BRAND NEW VISION)
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. - answersD) a proton.
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] - answersD) [all of these]
Suppose 10 J of work is done in pushing a 1-Ccharge 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. - answersC) kinetic energy.
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] - answersD) [all of these]
If you stretch a copper wire so that it is thinner, the resistance between its ends
A) decreases.
B) remains unchanged.
C) increases. - answersC) increases.
When you turn on a lamp, the initial current in its filament is greater at first, rather than a
moment later, which indicates
A) something is faulty.
B) a time delay for current attaining its average speed.
C) increased temperature means increased resistance.
D) nothing of interest. - answersC) increased temperature means increased resistance.
Just as gravity is the study of a wide range of gravitational interactions, electricity is the study of
a wide range of
A) electrical charges.
B) electrical forces.
C) electrical interactions.
D) [none of these] - answersC) electrical interactions.
