5)
A convex lens has a focal length f. An object is placed at a distance between f and 2f on
a line perpendicular to the center of the lens. The image formed is located at what
distance from the lens?
A) f
B) between the lens and f
C) between f and 2f
D)
the figure, two solenoids are approaching each other with speed v as shown. The
induced current through the resistor R is
16) In
16)
A) from a
to b.
B) from b to a.
C) There is no induced current through the resistor.
Answer: A
the figure, a straight wire
A) 1
B) 2
C)
3
D) 4
E) 5
Answer: C
very long parallel wires in the xy-plane, a distance 2a apart, are parallel to the
y-axis and carry equal currents I as shown in the figure. The +z direction points
perpendicular to the xy-plane in a right-handed coordin
18) Two
identical small conducting spheres are separated by 0.60 m. The spheres carry
different amounts of charge and each sphere experiences an attractive electric force of
10.8N. The total charge on the two spheres is -24 C. The two spheres are now
conn
4)
A charge is accelerated from rest through a potential difference V and then enters a
uniform magnetic field oriented perpendicular to its path. The field deflects the particle
into a circular arc of radius R. If the accelerating potential is tripled to
MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.
22) A
charged particle of mass 0.0020 kg is subjected to a 6.0 T magnetic field which acts
at a right angle to its motion. If the particle moves in a circle of radius
coil in a 60-Hz ac generator has 125 turns, each having an area of 3.0 10 -2 m2
and is rotated in a uniform 0.12-T magnetic field. What is the peak output voltage of
this generator?
A) 170 V
B) 200 V
C) 220 V
D) 110 V
E) 120 V
35) The
35)
Answer: A
36) Su
SHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.
28) As
shown in the figure, two long straight wires are separated by a distance of
d = 0.80 m. The currents are I1 = 2.0 A to the right in the upper wire and
I2 = 7.0 A to
SHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.
rigid circular loop has a radius of 0.20 m and is in the xy-plane. A clockwise
current I is carried by the loop, as shown. The magnitude of the magnetic
moment of the loop
wire, often used for heating elements, has resistivity of 1.0 10-6 m at
room temperature. What length of No. 30 wire (of diameter 0.250 mm) is needed to
wind a resistor that has 50 ohms at room temperature?
A) 6.54 m
B) 22.4 m
C) 0.61 m
D) 3.66 m
E) 2.45
A) 1
B) 2
C)
3
D) 4
E) 5
Answer: B
SHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.
13) A
5.0- resistor and a 9.0- resistor are connected in parallel. A 4.0- resistor
is then connected in series with this parallel combin
Exam
Name_
MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.
1)
As more resistors are added in parallel across a constant voltage source, the power
supplied by the source
A) decreases.
B) increases.
C) does not chang
22) For
the circuit shown in the figure, the switch has been open for a very long time.
22)
(a) What is the potential drop across the 15.0-mH inductor just after closing the
switch?
(b) What is the potential drop across the 70.0-F capacitor after the swit
MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.
in air is initially traveling parallel to the face AC of an equilateral triangular
prism, as shown in the figure. The prism is made of glass with an index of refracti
y component of the electric field of an electromagnetic wave traveling in the +x
direction through vacuum obeys the equation Ey = (375 N/C) cos[kx - (2.20 1014
rad/s)t]. What is the wavelength of this electromagnetic wave? (c = 3.0 108 m/s)
A) 17.1 m
B) 8
4)
A narrow copper wire of length L and radius b is attached to a wide copper wire of
length L and radius 2b, forming one long wire of length 2L. This long wire is attached
to a battery, and a current is flowing through it. If the electric field in the na
The work done by the electric field to move a charge q a distance d:
W=Fd=qEd
Electric potential energy
Negative of the work done by the electric force
PEb - PEa
-qEd
electric potential difference work done to move unit charge from one point to
another
Vb
interatomic forces 3D lattice- The atoms are held together by
stiff (makes object rigid)
interatomic forces are modeled by springs that are _
elastic All real "rigid" bodies are to some extent
tensile stress cylinder is stretched vertically
shear stress a
37) The
figure shows an arrangement of two -4.5 nC charges, each separated by 5.0 mm
from a proton. If the two negative charges are held fixed at their locations and the
proton is given an initial velocity v as shown in the figure, what is the minimum ini
4)
A coil lies flat on a tabletop in a region where the magnetic field vector points straight
up. The magnetic field vanishes suddenly. When viewed from above, what is the
direction of the induced current in this coil as the field fades?
A) clockwise then
35) Four
capacitors are connected across a 90-V voltage source as shown in the
figure.
35)
(a) What is the charge on the 4.0-F capacitor?
(b) What is the charge on a 2.0-F capacitor?
(c) What is the charge on the 3.0-F capacitor?
(d) What is the potential
26) For
the circuit shown in the figure, all quantities are accurate to 3 significant figures.
What is the power dissipated in the 2- resistor?
A) 6.67
W
B) 5.33
W
C)
8.0 W
D) 2.67
W
E) 3.56
26)
W
Answer: E
27) When
a 20.0-ohm resistor is connected across
MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.
average intensity of the sunlight in Miami, Florida, is 1.04 kW/m2. For surfaces on
which the light is all absorbed, what is the average value of the radiation pressu
MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.
38) As
shown in the figure, an insulated wire is bent into a circular loop of radius 6.0 cm
and has two long straight sections. The loop is in the xy-plane, with the
55) A
pair of charged conducting plates produces a uniform field of 12,000 N/C, directed
to the right, between the plates. The separation of the plates is 40 mm. An electron is
projected from plate A, directly toward plate B, with an initial velocity of
v
A) 1
B) 2
C)
3
D) 4
E) 5
Answer: D
very long, solid, conducting cylinder of radius R carries a current along its length
uniformly distributed throughout the cylinder. Which one of the graphs shown in the
figure most accurately describes the magnitude B of
37) Two
point charges of +20.0 C and -8.00 C are separated by a distance of 20.0 cm.
What is the magnitude of electric field due to these charges at a point midway between
them? (k = 1/40 = 8.99 109 N m2/C2)
A) 25.2 104 N/C directed toward the negative ch
SHORTANSWER.Writethewordorphrasethatbestcompleteseachstatementoranswersthequestion.
21) Four
equal +6.00-C point charges are placed at the corners of a square 2.00 m
on each side. (k = 1/40 = 8.99 109 N m2/C2)
(a) What is the electric potential (relative
8)
A charge Q is uniformly spread over one surface of a very large nonconducting square
elastic sheet having sides of length d. At a point P that is 1.25 cm outside the sheet, the
magnitude of the electric field due to the sheet is E. If the sheet is now
series LRC ac circuit has a peak voltage of 111 V and a peak current of 2.00 A. If the
current lags the voltage by 35.0, what is the average power of the circuit?
A) 182 W
B) 78 W
C) 91 W
D) 156 W
41) A
41)
Answer: C
LRC ac circuit has a reactance (due to