Chapter 16: Electrical Energy and Capacitance Flashcards
A and B are both points on an equipotential surface. What is the potential difference between point A and B?
Select one:
a. It is zero.
b. To solve this, the electric potential at both A and B must be known.
c. To solve this, the electric potential of the equipotential surface must be known.
d. To solve this, the path taken from A to B must be known.
It is zero
A capacitor is designed so that one plate is large and the other is small. If the plates are connected to a battery,
Select one:
a. the plates have equal, but opposite, charge.
b. the large plate has less charge than the small plate.
c. the large plate has a greater charge than the small plate.
the plates have equal, but opposite, charge.
A parallel-plate capacitor is connected to a battery. What happens to the stored energy if the plate separation is doubled while the capacitor remains connected to the battery? Select one: a. It increases by a factor of 4 b. It decreases by a factor of 2 c. It remains the same d. It is doubled
It decreases by a factor of 2
Capacitance is
Select one:
a. the ratio of the magnitude of the charge on either conductor of a capacitor to the magnitude of the potential difference between the conductors.
b. all of these choices.
c. measured in farads.
d. constant for a parallel-plate capacitor.
all of these choices.
Consider a collection of charges in a given region and suppose all other charges are distant and have a negligible effect. Further, the electric potential is taken to be zero at infinity. If the electric potential at a given point in the region is zero, which of the following statements must be true?
Select one:
a. The electric field is zero at that point
b. There is no net charge in the region
c. Some charges in the region are positive, and some are negative
d. The electric potential energy is a minimum at that point
Some charges in the region are positive, and some are negative
