When a glass rod is rubbed with silk and becomes positively charged
electrons are removed from the rod
100
When a capacitor discharges
charges move from one plate to another through the circuit until both plates are uncharged
100
Which of the following is NOT a characteristic of electrical potential energy?
It results from a single charge
100
If a conductor is in electrostatic equilibrium, the electric field inside the conductor
is zero
100
Which sentence best characterizes electric insulators?
Charges on their surface do not move.
200
Which of the following transfers charge most easily?
conductors
200
Charge build up between the plates of a capacitor stops when
the potential difference between the plates equals the potential difference between the terminals of the battery
200
When a positive charge moves because of a force, what occurs to the electrical potential energy associated with the charge’s position in the system
It decreases
200
If a conductor is in electrostatic equilibrium, any excess charge
resides entirely on the conductor’s outer surface
200
Which of the following is NOT true for both gravitational and electric forces?
Forces can be either attractive or repulsive
300
The process of charging a conductor by bringing it near another charged object and then grounding the conductor is called
induction
300
A capacitor consists of two metal plates; __________ is stored on one plate and
__________ is stored on the other
negative charge; positive charge
300
Two positive point charges are initially separated by a distance of 2 cm. If their separation is increased to 6 cm, the resultant electrical potential energy is what factor
times the initial electrical potential energy?
1/3
300
Four charges—A, B, C, and D— are at the corners of a square. Charges A and D, on opposite corners, have equal charge, while both B and C have a charge of 1.0 C. If the
force on B is zero, what is the charge on A
–0.35 C
300
If the charge and mass are tripled for two identical charges maintained at a constant separation, the electric and gravitational forces between them will be changed by what
factor
9
400
Both insulators and conductors can be charged by
contact
400
Increasing the separation of the two charged parallel plates of a capacitor that are disconnected from a battery will produce what effect on the capacitor?
It will decrease the capacitance
400
Electrical potential energy is measured in what unit
Joules
400
If an irregularly-shaped conductor is in electrostatic equilibrium, charge accumulates
where the radius of curvature is smallest
400
When a positive charge moves because of a force, what occurs to the electrical potential energy associated with the charge’s position in the system?
It decreases
500
Unlike insulators, conductors can be charged by
polarization
500
Increasing the potential difference across the two plates of a capacitor will produce what effect on the capacitor?
It will increase charge
500
Electrical potential energy results from conservative _____________ forces
Coulomb
500
Charge A and charge B are 2 m apart. Charge A is 1 C and charge B is 2 C. Charge C, which is 2 C, is located between them, and the force on charge C is zero. How far from
charge A is charge C