PHY 112 Final Exam Review Questions &
Answers (Grade A+)
Electrically neutral objects cannot exert an electrical force on each
other -
correct answer ✅FALSE
In outer space, a positive charge q is released near a positive fixed
charge Q, as shown in the figure. As q moves away from Q, it will
move with increasing speed -
correct answer ✅TRUE
Two stationary charges point charges q1 and q2 are shown in the
figure along with a sketch of
some field lines representing the electric field produced by them.
From the sketch we can deduce
that q1 is negative, q2 is positive, and that the magnitudes are
equal. -
correct answer ✅FALSE - the magnitudes are NOT equal q1<q2
If the electric field between the plates of a given air-filled capacitor
is weakened by removing
charge from the plates, the capacitance of that capacitor decreases.
-
correct answer ✅FALSE - it does not change
, PHY 112 Final Exam Review Questions &
Answers (Grade A+)
If the radius of a certain wire is kept the same but its length
doubles, the resistance doubles -
correct answer ✅TRUE
When the current through a resistor is increased by a factor of 4,
the power dissipated by the
resistor increases by a factor of 8. -
correct answer ✅FALSE - increases by a factor of 16
When two or more different capacitors are connected in parallel
across a potential source, the capacitor with the largest capacitance
has the most charge. -
correct answer ✅FALSE - the capacitance is the same across each
capacitor
Four unequal resistors are connected in series with each other. The
equivalent resistance is more than the largest resistance. -
correct answer ✅TRUE
An electron, moving south, enters a magnetic field. Because of this
field, the electron curves upward. We may conclude that the
Answers (Grade A+)
Electrically neutral objects cannot exert an electrical force on each
other -
correct answer ✅FALSE
In outer space, a positive charge q is released near a positive fixed
charge Q, as shown in the figure. As q moves away from Q, it will
move with increasing speed -
correct answer ✅TRUE
Two stationary charges point charges q1 and q2 are shown in the
figure along with a sketch of
some field lines representing the electric field produced by them.
From the sketch we can deduce
that q1 is negative, q2 is positive, and that the magnitudes are
equal. -
correct answer ✅FALSE - the magnitudes are NOT equal q1<q2
If the electric field between the plates of a given air-filled capacitor
is weakened by removing
charge from the plates, the capacitance of that capacitor decreases.
-
correct answer ✅FALSE - it does not change
, PHY 112 Final Exam Review Questions &
Answers (Grade A+)
If the radius of a certain wire is kept the same but its length
doubles, the resistance doubles -
correct answer ✅TRUE
When the current through a resistor is increased by a factor of 4,
the power dissipated by the
resistor increases by a factor of 8. -
correct answer ✅FALSE - increases by a factor of 16
When two or more different capacitors are connected in parallel
across a potential source, the capacitor with the largest capacitance
has the most charge. -
correct answer ✅FALSE - the capacitance is the same across each
capacitor
Four unequal resistors are connected in series with each other. The
equivalent resistance is more than the largest resistance. -
correct answer ✅TRUE
An electron, moving south, enters a magnetic field. Because of this
field, the electron curves upward. We may conclude that the
