Transcript SS Review for Final

Circuits to Optics
June 16, 2004
Which type of field is present near a moving
electric charge?
(A) an electric field, only
(B) a magnetic field, only
(C) both an electric field and a magnetic field
(D) neither an electric field nor a magnetic
field
The electric circuit consists of a 12-volt
battery, a 3.0-ohm resistor, R1, and a variable
resistor, R2. At what value must the variable
resistor be set to produce a current of 1.0
ampere through R1?
(A) 6.0 Ω
(B) 3.0 Ω
(C) 9.0 Ω
(D) 12 Ω
An electric bell connected to a battery is sealed
inside a large jar. What happens as the air is
removed from the jar?
(A) The bell’s loudness increases because of
decreased air resistance.
(B) The bell’s loudness decreases because sound
waves can not travel through a vacuum.
(C) The electric circuit stops working because
electromagnetic radiation can not travel
through a vacuum.
(D) The bell’s pitch decreases because the
frequency of the sound waves is lower in a
vacuum than in air.
As a sound wave passes from water, where the speed
is 1.49 × 103 meters per second, into air, the wave’s
speed
(A) decreases and its frequency remains the same
(B) increases and its frequency remains the same
(C) remains the same and its frequency decreases
(D) remains the same and its frequency increases
Which phenomenon occurs when an object
absorbs wave energy that matches the object’s
natural frequency?
(A) reflection
(B) resonance
(C) diffraction
(D) interference
Which wave diagram has both wavelength (λ)
and amplitude (A) labeled correctly?
What is the total resistance of the circuit
segment?
(A) 1.0 
(B) 9.0 
(C) 3.0 
(D) 27 
In the circuit
diagram, what
are the correct
readings of
voltmeters V1
and V2?
(A) V1 reads 2.0 V and V2 reads 4.0 V
(B) V1 reads 4.0 V and V2 reads 2.0 V
(C) V1 reads 3.0 V and V2 reads 3.0 V
(D) V1 reads 6.0 V and V2 reads 6.0 V
A 20-ohm resistor and a
30-ohm resistor are connected
in parallel to a 12-volt battery as shown. An
ammeter is connected as shown. What is the
equivalent resistance of the circuit?
(A) 10. Ω
(B) 25 Ω
(C) 12 Ω
(D) 50. Ω
A 20-ohm resistor and a
30-ohm resistor are connected
in parallel to a 12-volt battery as shown. An
ammeter is connected as shown. What is the
current reading of the ammeter?
(A) 1.0 A
(B) 0.40 A
(C) 0.60 A
(D) 0.20 A
A 20-ohm resistor and a
30-ohm resistor are connected
in parallel to a 12-volt battery as shown. An
ammeter is connected as shown. What is the
power of the 30.-ohm resistor?
(A) 4.8 W
(B) 12 W
(C) 30 W
(D) 75 W
A physics student notices that 4.0
waves arrive at the beach every 20
seconds. The frequency of these
waves is
(A) 0.20 Hz
(B) 16 Hz
(C) 5.0 Hz
(D) 80 Hz
An electric guitar is generating a
sound of constant frequency. An
increase in which sound wave
characteristic would result in an
increase in loudness?
(A) speed
(B) period
(C) wavelength
(D) amplitude
How many wavelengths separate point A and
point B?
(A) 1.0
(B) 3.0
(C) 1.5
(D) 0.75
Which diagram best represents magnetic field
lines around a bar magnet?
The spaceship is moving away from Earth when
the radio signal is received. Compared to the
frequency of the signal sent from Earth, the
frequency of the signal received by the
spaceship is
(A) lower
(B) higher
(C) the same
What is the total electrical energy used
by a 1500-watt hair dryer operating for
6.0 minutes?
(A) 4.2 J
(B) 250 J
3
(C) 9.0×10 J
(D) 5.4×105 J
A periodic transverse wave has an
amplitude of 0.20 meter and a
wavelength of 3.0 meters. If the
frequency of this wave is 12 Hz,
what is its speed?
(A) 0.25 m/s (C) 36 m/s
(B) 12 m/s
(D) 4.0 m/s
An electric iron operating at 120 volts
draws 10 amperes of current. How much
heat energy is delivered by the iron in 30
seconds?
(A) 3.0 × 102 J
(B) 1.2 × 103 J
(C) 3.6 × 103 J
(D) 3.6 × 104 J
A motor is used to produce 4.0 waves
each second in a string. What is the
frequency of the waves?
(A) 0.25 Hz
(B) 25 Hz
(C) 15 Hz
(D) 4.0 Hz
A surfacing whale in an aquarium
produces water wave crests having an
amplitude of 1.2 meters every 0.40
second. If the water wave travels at 4.5
meters per second, the wavelength of the
wave is
(A) 1.8 m (B) 2.4 m (C) 3.0 m (D) 11 m
A radar gun can determine the speed of a
moving automobile by measuring the
difference in frequency between emitted
and reflected radar waves. This process
illustrates
(A) resonance
(B) diffraction
(C) the Doppler effect
(D) refraction
A laser beam is
directed at the
surface of a
smooth, calm
pond. Which
organisms could
be illuminated by the laser light?
(A) the bird and the fish
(B) the crab and the seaweed
(C) the bird and the seaweed
(D) the crab and the fish
A photon of which electromagnetic
radiation has the most energy?
(A) ultraviolet
(B) x ray
(C) infrared
(D) microwave
What is the reading on ammeter A?
(A) 1.3 A
(C) 3.0 A
(B) 1.5 A
(D) 0.75 A
Two pulses are traveling toward each other in a
uniform medium. Which diagram best represents
the medium when the pulses meet at point X?
(A)
(B)
(C)
(D)
A mass, M, is hung from
a spring and reaches
equilibrium at position B.
The mass is then raised to
position A and released.
The mass oscillates between
positions A and C.
At which position, A, B, or C,
is mass M located when the
kinetic energy of the system
is at a maximum?
A mass, M, is hung from
a spring and reaches
equilibrium at position B.
The mass is then raised to
position A and released.
The mass oscillates between
positions A and C.
At which position, A, B, or C,
is mass M located when the
gravitational potential energy
of the system is at a maximum?
A mass, M, is hung from
a spring and reaches
equilibrium at position B.
The mass is then raised to
position A and released.
The mass oscillates between
positions A and C.
At which position, A, B, or C,
is mass M located when the
elastic potential energy of the
system is at a maximum?