True-false questions are worth 2 points each, three-choice multiple
choice questions are worth 3 points each, five-choice multiple choice
questions are worth 6 points each. The maximum possible score is 95.
The exam period was 75 minutes; the mean score was 66.4 the median was
66. Click here to see page1
page2 page3 of the formula sheet that came with
Some helpful information:
· A physics 102 light bulb acts just like a resistor: its
resistance is constant, independent of the current flowing through the light
bulb. The bulb's brightness increases with increasing current.
· A reminder about prefixes: p (pico) = 10-12; n
(nano) = 10-9; μ (micro) = 10-6; m (milli) =
10-3; k (kilo) = 10+3; M or Meg (mega) =
10+6; G or Gig (giga) = 10+9.
Does the generator attract the neutral hanging sphere?
(a) Yes, the van de Graaff generator attracts the hanging metal sphere.
(b) No, the van de Graaff generator does not attract the hanging metal sphere.
(a) They induce negative charge on the grounded sphere.
(b) They induce positive charge on the grounded sphere.
(c) They cannot induce a charge on the neighboring sphere as long as that sphere is grounded.
Positive charges, each equal to = 4 nC, are located at
(x = -5 m, y = 12 m) and (x = 5 m, y = 12
m); and a negative charge q = -4 nC is located at (x = 0, y = 12 m).
At the origin, the x-component of the electric field Ex
(a) 0.14 N/C
(b) 0.086 N/C
(d) -0.086 N/C
(e) -0.14 N/C
(a) 43.2 nJ
(b) 10.1 nJ
(d) -10.1 nJ
(e) -43.2 nJ
A positive charge q1 = 8 nC is located at the
origin. A second positive charge, q2 = 5 nC, is
located on the x-axis, at x = 10 cm.
There is only one point on the x-axis at which the net
electric field equals zero. Where is that point located? Find the
formula which that location (labeled by x) obeys. (All lengths
are in cm.)
(a) x < 0
(b) 0 < x < 5
(c) x = 5
(d) 5 < x < 10
(e) x > 10
(a) 148 V
(b) 212 V
(c) 1380 V
the circuit shown, the battery voltage ε = 9 volts, and the
capacitors C1 = 6 μF, C2 = 27 μF and
C4 = 15 μF.
As of now, we are not told the value of C3.
Nevertheless, what can we say about Q2 (the charge on
C2) versus Q3 (the charge on
(a) Q2 is greater than Q3.
(b) Q2 is not greater than Q3.
(c) We need to know the value of C3 before we can answer this question.
(a) 54 μC
(b) 68 μC
(c) 144 μC
(d) 188 μC
(e) 297 μC
(a) 54 μC
(b) 81 μC
(c) 146 μC
(a) CA = CB
(b) CA > CB
(c) CA < CB
As the plates of the capacitor are pulled apart, what happens to the
hanging gold strips?
(a) They collapse (fall together).
(b) They fly apart.
(a) 3 Ω
(b) 4.8 Ω
(c) 7.2 Ω
(d) 12 Ω
(e) 20 Ω
In this circuit, you are given:
R1 = 15 Ω
R2 = 20 Ω
R3 = 20 Ω
R4 = 5 Ω
R5 = 35 Ω
You are also told that a current I1 =
0.4 A flows downward through R1.
Calculate the battery voltage.
(a) 2 V
(b) 3 V
(c) 4 V
(d) 5 V
(e) 6 V
(a) 7.5 Ω
(b) 22 Ω
(c) 25 Ω
(d) 30 Ω
(e) 95 Ω
(a) 1 V
(b) 4 V
(c) 8 V
These three questions refer to three different experiments conducted
with the circuit shown. In each, assume the capacitor starts uncharged.
Close both switches at t = 0. After a long time has elapsed,
what is the current through the 12 Ω resistor?
(b) 0.5 A
(c) 1.25 A
(b) 0.5 A
(c) 0.83 A
(d) 1.25 A
(e) 2.08 A
(a) 7.05 μC
(b) 6.10 μC
(c) 4.14 μC
(d) 3.15 μC
(e) 2.10 μC
True or false: resistors R2 and R3 can be
combined into a single resistor because they are in series.
(a) I4 = I3 + I2
(b) I1 + I2 = I3 + I4
(c) I1 + I2 = I4 - I3
(a) -V2 - I2R4 + I3R5 = 0
(b) I3R5 + I4R6 - V3 = 0
(c) V3 + I4R6 - V2 - I2R4 = 0