Physics 2 Exam 2 Study Guide
B) The electric field is not zero everywhere on the Gaussian surface.
A sphereical Gaussian surface surrounds an electric dipole. The net enclosed charge is zero. Which is true?
C) vf < vi
An electron follows the trajectory shown from i to f. At point f,
E) Moves to the left with increasing speed
An electron is released from rest at x = 2m in the potential shown. What does the electron do right after being released?
D) The electric field points right and the electric potential is zero
At the midpont between these two equal but opposite charges,
A) At Xa
At which point is the electric field stronger?
E) More than one of these (A, C, D).
At which point or pints is the electric potential zero?
E) Parallel Capacitors and Series Capacitors (both a and c)
Chapter 26 investigated
B) +3 nC
Charge +3nC is in a hollow cavity inside a large chunk of metal that is electrically neutrAal. The total charge on the exterior surface of the metal is
A) 9 µf
The equivalent capacitance is
D) 2 µf
The equivalent capacitance is
B) v2 = v3
Two protons, one after the other, are launched from point 1 with the same speed. They follow the two trajectories shown. The protons' speeds at points 2 and 3 are related by
B) Rock B
Two rocks have equal mass. Which has more gravitational potential energy?
D) Volts
What are the units of potential difference?
B) Faraday (F)
What is the SI unit of capacitance?
C) 2 nF
What is the capacitance of these two electrodes?
C) 1/3
What is the ratio Vb/Va of the electric potential at the two points?
C) emf
What quantity is represented by the symbol ℰ?
C) Equipotential surfaces are surfaces that have the same value of potential at every point
Which of the following statements about equipotential surfaces is true
B
Which set of equipotential srufaces matches this electric field?
B) Surface B
Which spherical Gaussian surface has the larger electric flux?
C) The fluxes are equal
Which surface, A or B, has the larger electric flux?
B) Increases linearly from the negative to the positive plate
The electric potential inside a capacitor
E) 8 mJ
A capacitor charged to 1.5 V stores 2.0 mJ of energy. If the capacitor is charged to 3.0 V, it will store
A) 0
A cylindrical Gaussian surface surrounds an infinite line of charge. The flux Φ through the two flat ends of the cylinder is
B) 2πrLE
A cylindrical Gaussian surface surrounds an infinite line of charge. The flux Φ through the wall of the cylinder is
D) -50 V
A particle follows the trajectory shown from initial position i to final position f. The potential difference V is
D) 0
A point charge q is located distance r from the center of a neutral metal sphere. the electric field at the center of the sphere is
C) A negative potential energy becomes more negative.
A positive and negative charge are released from rest in vacuum. They move toward each other. As they do,
C) Decreases
A positive charge moves as shown. Its kinetic energy
E) Moves downward with an increasing speed.
A proton is released from rest at the dot. Afterward, the proton
D) Closed surfaces
Gauss's law applies to
A) Symmetric
Gauss's law is useful for calculating electric fields that are
D) Lower electric potential
If a positive charge is released from rest, it moves in the direction of
C) They have the same electric field
Spherical Gaussian surfaces of equal radius R surround two spheres of equal charge Q. Which Gaussian surface has the larger electric field?
A) Surface A has more flux
Surfaces A and B have the same shape and the same area. Which has the larger electric flux?
A) Same potential
Metal spheres 1 and 2 are connected by a metal wire. What quantities do sphere 1 and 2 have in common?
B) 3 V
Metal wires are attached to the terminals of a 3 V battery. What is the potential difference between points 1 and 2.
C) V/m
New units of the electric field were introduced in this chapter. What are they?.
A) electric flux
The amount of electric field passing through a surface is
C) 3 V
The charge escalator in a battery does 4.8 *10^-19 J of work for each positive ion that it moves from the negative to the positive terminal. What is the battery's emf?
A) is always perpendicular to an equipotential surface.
The electric field
A) 10 V/m
The electric field at the dot is
B) zero
The electric field inside a conductor in electrostatic equilibrium is
B) Negative charge
The electric field is constant over each face of the box. The box contains
B) q1 = 2q; q2 = -q
The electric flux is shown through two Gaussian surfaces. In terms of q, what are the charges q1 and q2?
A) 0
The electric flux through the shaded surface is
C) 400 N m^2/C
The electric flux through the shaded surface is
C) 400cos(70°) N m^2/C
The electric flux through the shaded surface is
C) The inverse of the distance between the two charges
The electric potential energy of a system of two point charges is proportional to
A) Surface A
These are cross sections of 3D closed surfaces. The top and bottom surfaces, which are flat, are in front of and behind the screen. The electric field is everywhere parallel to the screen. Which closed surface or surfaces have zero electric flux?
D) -1000 V
This is a graph of the x-component of the electric field along the x-axis. The potential is zero at the origin. What is the potential at x = 1m?
B) Charge B
Two negative charges are equal. Which has more electric potential energy?
Charge A
Two positive charges are equal. Which has more electric potential energy?