A surface on which all points are at the same potential is referred to as
A) a constant electric force surface.
B) a constant electric field surface.
C) an equipotential surface.
D) an equivoltage surface.
E) a dielectric surface.
A light ray enters a glass enclosed fishtank. From air it enters the glass at 20. with
respect to the surface, then emerges into the water. The index for glass is 1.50 and for
water 1.33.
(a) What is the angle of refraction in the glass?
(b) What is the angle of refraction in the water?
(c) Is there any incident angle in air for which the ray will not enter the water due to
total internal reflection?
Consider the standing wave on a guitar string and the sound wave generated by the
guitar as a result of this vibration. What do these two waves have in common?
A) They have the same velocity.
B) They have the same wavelength.
C) They have the same frequency.
D) They have nothing in common.
One of the harmonics of a string fixed at both ends has a frequency of 52.2 Hz and the
next higher harmonic has a frequency of 60.9 Hz. What is the fundamental frequency of
the string?
A) 26.1 Hz
B) 8.7 Hz
C) 4.35 Hz
D) 30.4 Hz
E) 17.4 Hz
If vector = -3.0 – 4.0 , and vector = +3.0 -8.0 , then the magnitude
of vector = – is
A) 3.0
B) 16
C) 7.2
D) 144
E) 13.4
Given 1 angstrom unit = 10-10 m and 1 fermi = 10-15 m , what is the relationship
between these units?
A) 1 angstrom = 10+5 fermi
B) 1 angstrom = 10-5 fermi
C) 1 angstrom = 10-25 fermi
D) 1 angstrom = 10+25 fermi
E) none of the given answers
A package of supplies is dropped from a plane, and one second later a second package
is dropped. Neglecting air resistance, the relative velocity of the 1st package viewed
from the second will
A) depend upon their weight.
B) be constant.
C) increase.
D) decrease.
E) be zero.
FIGURE 5-7
An object is under the influence of a force as represented by the force vs. position graph
in Fig. 5-7. What is the work done as the object moves from 4 m to 6 m?
A) 20 J
B) 30 J
C) 0 J
D) 40 J
E) 70 J
In a vacuum, the relative permeability is
A) zero.
B) 4π 10-7 T/A-m.
C) 1.0.
D) infinite.
E) 8.99 109.
A reversible engine takes in 40. Joules of heat, does 10. J of work, and expels 30. J of
wasted heat during each cycle. If it is operated in reverse as a refrigerator, then its COP
would be
A) 25%.
B) 4.
C) 3.
D) 4%.
E) 75%.
The sky appears “blue” because of
A) Bragg’s Law.
B) Rayleigh scattering.
C) Brewster’s polarization.
D) dichroism.
E) birefringence.
An observer sees two spaceships, S1 and S2, each having the same length in its own rest
frame, traveling toward each other along parallel lines from opposite directions, with
equal speeds relative to the observer. As seen by this observer, the two spaceships have
the same length and, when they are next to each other, the nose of one coincides with
the tail of the other, and vice-versa. However, as seen by passengers on either one of the
spaceships, the other spaceship is shorter than their own, so if the tail of the other
spaceship is in line with the nose of their spaceship, the nose of the other spaceship
cannot be lined up with the tail of theirs. How can you explain this discrepancy?
The lower the frequency of a sound wave, the
A) lower its velocity.
B) greater its wavelength.
C) smaller its amplitude.
D) shorter its period.
E) greater its velocity.
Daisy raises 10.Kg to a height of 2.5 meters in 2.0 seconds.
(a) How much work did she do?
(b) How much power was expended?
(c) If she raises it in 1.0 s rather than 2.0 s, how do the work and power change?
The total energy of a particle at rest is
A) zero.
B) (1/2) mo c2.
C) mo c2.
D) p2/(2 mo) .
For a spherical planet to act like a “point mass”, so that externally F=GmM/r2, it
A) must have constant density throughout.
B) must have a mass << r c2 / (2G).
C) must have spherical mass symmetry.
D) can not be hollow inside.
A spaceship is traveling to the moon. At what point is it beyond the pull of Earth’s
gravity?
A) when it is closer to the moon than it is to Earth
B) when it gets above the atmosphere
C) when it is half-way there
D) when it is three-fourths of the way there
E) It is never beyond the pull of Earth’s gravity.
How many protons are there in the carbon-14 nucleus?
A) 8
B) 14
C) 6
D) 1
E) none
When a liquid freezes
A) the temperature of the substance increases.
B) the temperature of the substance decreases.
C) heat energy leaves the substance.
D) heat energy enters the substance.
The colors on an oil slick are caused by reflection and
A) diffraction.
B) interference.
C) refraction.
D) polarization.
Substitute the correct prefix to the fun-word “10-1 and Lucy”.
A) tera
B) deci
C) peta
D) pico
E) giga
In the hydrogen atom, if the principal quantum number n = 4, how many possible
values can the orbital quantum number ℓ have?
A) 8
B) 9
C) 3
D) 5
E) 10
F) 4
The compact disc stores information by means of
A) holography.
B) pits and lands.
C) Compton scattering.
D) stimulated absorption.
E) the photoelectric effect.
A beam of light in water (n = 1.33) enters a glass slab (n = 1.50) at an angle of
incidence of 60.0. What is the angle of refraction?
A) 27.5
B) 39.8
C) 60.0
D) 90.0
E) 50.2
When the first law of thermodynamics, Q = Δu + W, is applied to an ideal gas that is
taken through an isothermal process,
A) Δu = 0.
B) W = 0.
C) Q = 0.
D) ΔP = 0.
A container is filled with a mixture of helium and oxygen gases. A thermometer in the
container indicates that the temperature is 22.C. Which gas molecules have the greater
average kinetic energy?
A) It is the same for both because the temperatures are the same.
B) The oxygen molecules do because they are more massive.
C) The helium molecules do because they are monatomic.
D) The oxygen molecules do because they are diatomic.
E) The helium molecules do because they are less massive.
The process whereby heat flows by the mass movement of molecules from one place to
another is referred to as
A) conduction.
B) convection.
C) radiation.
D) inversion.
E) evaporation.
FIGURE 13-6
The equation of motion of the wave shown in Fig. 13-6 is
A) y = 0.5 cos (40t).
B) y = 1.0 sin (πt).
C) y = 0.5 sin (40t).
D) y = 0.5 cos (πt).
E) y = 1.0 cos (2πt).
The ratio of energy to frequency for a given photon gives
A) its amplitude.
B) its velocity.
C) Planck’s constant.
D) its work function.
Which isotope is used to define the ATOMIC MASS UNIT?
A) 1H
B) 2H
C) 4He
D) 12C
E) 16O
A circular loop of wire of cross-sectional area 0.12 m2 consists of 200. turns, each
carrying 0.50 A. It is placed in a magnetic field of 0.050 T oriented at 30 to the plane of
the loop. What torque acts on the loop?
FIGURE 16-4
Three capacitors are connected as shown in Fig. 16-4. What is the equivalent
capacitance between points A and B?
A) 1.7 μF
B) 4.0 μC
C) 7.1 μF
D) 12 μF
E) 8.0 μF
An ac generator consists of a coil with 40 turns of wire, each with an area of 0.06 m2.
The coil rotates in a uniform magnetic field B = 0.4 T at a constant frequency of 55Hz.
What is the maximum induced emf?
A) 110 V
B) 625 V
C) 200 V
D) 421 V
E) 332 V