Q1) In which of the circuits below does a current exist to
light the bulb?
1) 1
2) 2
3) 3
4) 4
5) 5
Q2) Which one of the following circuits has the largest
resistance?
1) a
2) b
3) c
4) d
5) e
Q3) A 12  resistor is connected to a 120 V battery. What net
charge passes through any point in the circuit during a 1-minute
interval?
1) 10 C
2) 60 C
3) 100 C
4) 600 C
5) 1200 C
Q4) The emf of a battery is equal to its terminal potential
difference:
1) under all conditions
2) only when the battery is being charged
3) only when a large current is in the battery
4) only when there is no current in the battery
5) under no conditions
Q5) Consider two identical resistors wired in series (one behind the
other). If there is an electric current through the combination, the
current in the second resistor is
1) equal to
2) half
3) smaller than, but not necessarily half
the current through the first resistor.
Q6) Two lamps, one with a thick filament and one with a thin
filament, are connected in series. The current is greater in the lamp
with the
1) thick filament
2) thin filament
3) the current is the same in each lamp
Q7) A simple series circuit contains a resistance R and an ideal
battery. If a second resistor is connected in parallel with R,
1) the voltage across R will decrease
2) the current through R will decrease
3) the total current through the battery will increase
4) the equivalent resistance of the circuit will increase
5) two of the above
Q8) A light bulb is connected to a battery as shown in Figure A
below. When a second bulb is connected as shown in Figure B,
what happens to the brightness of the original bulb?
1) Increases
2) Decreases
3) Stays the same
4) Bulb goes out
5) Can’t determine
Q9) As more identical resistors R are added
to the parallel circuit shown here, the total
resistance between points P and QB
1) increases.
2) remains the same.
3) decreases.
Q10) Three resistors, 6.0-, 9.0-, 15-, are connected in parallel
in a circuit. What is the equivalent resistance of this combination
of resistors?
1) 30 
2) 10 
3) 3.8 
4) 2.9 
5) 0.34 
Q11) A 1 resistor is placed in parallel with a 10,000  resistor as
shown. The total, equivalent resistance of these two resistor in
parallel is closest to...
1) a little less than 1
2) a little more than 1.
3) 5000 
4) a little less than 10000
5) a little more than 10000
1
I
10000
Q12) What is the equivalent resistance between the points A and B?
1) 3.8 Ω
2) 4.3 Ω
3) 5.1 Ω
4) 6.8 Ω
5) 9.0 Ω
Q13) The equivalent resistance between points 1 and 2 of the
circuit shown is:
1) 3
2) 4
3) 5
4) 6
5) 7
Q14) Each of the resistors in the diagram below has a resistance of
12 . The resistance of the entire circuit is:
1) 6 
2) 12 
3) 18 
4) 25 
5) 48 
Q15) Four resistors and a 6-V battery are arranged as shown in the
circuit diagram. Determine the equivalent resistance for this
circuit.
1) 50 Ω
2) 120 Ω
3) 29 Ω
4) 5 Ω
5) 12 Ω
Q16) By using only two resistors – singly, in series, or in parallel –,
you are able to obtain resistances of 3.0, 4.0, 12 and 16 . What are
the two resistances?
1) 3.0 and 4.0 
2) 3.0 and 12 
3) 3.0 and 16 
4) 4.0 and 12 
5) 4.0 and 16 
Q17) Modern automobile headlights are connected in
1) series
2) parallel
3) perpendicular
4) none of these
Q18) Two resistors R1=3 Ohms and R2=2 Ohms are in series
connected to a 12 volt battery. Which resistor is using more
power?
1) R1
2) R2
3) They use the same power since they have the same current
flowing through them
4) Can’t tell from this info
Q19) Two resistors R1=300 Ohms and R2=200 Ohms are in
parallel connected to a 12 volt battery. Which resistor is using
more power?
1) R1
2) R2
3) They use the same power since they have the same current
flowing through them
4) Can’t tell from this info
Q20) A 60 W bulb (240 Ohms) and a 75W (192 Ohms) bulb are in
series connected to a 120 volt wall socket. Which bulb will be
brighter?
1) 60W
2) 75W
3) They use the same power since they have the same current
flowing through them
4) Can’t tell from this info
Q21) Two 15- and three 25- light bulbs and a 24 V battery are
connected in a series circuit. What is the current that passes
through each bulb?
1) 0.23 A
2) 0.51 A
3) 0.96 A
4) 1.6 A
5) The current will be 1.6 A in the 15- bulbs and 0.96 A in the
25- bulbs.
Q22) In the figure below, if R1 > R2 > R3, rank the three resistances
according to (a) the current through them and (b) the potential
difference across them, greatest first.
1) (a) 3, 2, 1
2) (a) 3, 2, 1
3) (a) 3, 2, 1
4) (a) all tie
5) (a) all tie
(b) 3, 2, 1
(b) 1, 2, 3
(b) all tie
(b) all tie
(b) 1, 2, 3
Q23) Resistances of 2.0 , 4.0 , and 6.0  and a 24 V emf
device are all connected in series. The potential difference across
the 4.0  resistor is
1) 2.0 V
4) 12 V
2) 4.0 V
5) 24 V
3) 8.0 V
Q24) Two resistors are arranged in a
circuit that carries a total current of 15
A as shown in the figure. Which one
of the entries in the following table is
correct?
Current through 2- resistor
1)
2)
3)
4)
5)
5A
5A
10 A
15 A
10 A
Voltage across 4- resistor
10 V
20 V
20 V
15 V
10 V
Q25) Two light bulbs A and B are connected in series to a constant
voltage source. When a wire is connected across B as shown, bulb A
1) burns more brightly.
2) burns as brightly.
3) burns more dimly.
4) goes out.
Q26) Two light bulbs are connected to a
wall outlet as shown below. Bulb #1 is
100W and Bulb #2 is 40W. Which statement
is true?
1) Both bulbs are at their normal brightness.
2) The 100W bulb is brighter than the 40W bulb.
3) The 40W bulb is brighter than the 100W bulb.
4) Both bulbs are at equal brightness.
5) Cannot determine their relative brightness.
Q27) If in the diagram below, I1 = 2 A, what is the potential
difference between points a and b, and which point is at the higher
potential?
1) 50 V;
2) 50 V;
3) 10 V;
4) 10 V;
point a
point b
point a
point b
Q28) Consider the circuit below. How does the voltage difference
between points A and C compare to the voltage difference between
points A and D?
1) VAC < VAD
2) VAC = VAD
3) VAC > VAD
4) Cannot be determined
Q29) A battery with emf or voltage V is attached to a resistor of
resistance R. The circuit diagram is shown below. The point A is
at zero volts. The correct voltages at the points B, C, and D are:
1) VB = 0V, VC = 5V,
2) VB = 5V, VC < 5V,
3) VB = 5V, VC < 5V,
4) VB = 5V, VC = 5V,
5) None of these.
VD = 0V.
VD > 0V.
VD = 0V.
VD = 0V.
B
C
V=5V
R=10 
A
D
Q30) Charge flows through a light
bulb. Suppose a wire is connected
across the bulb as shown. When
the wire is connected,
1) all the charge continues to flow through the bulb.
2) half the charge flows through the wire, the other half continues
through the bulb.
3) all the charge flows through the wire.
4) none of the above
Q31) The circuit below consists of two
identical light bulbs burning with equal
brightness and a single 12 V battery. When
the switch is closed, the brightness of bulb A
1) increases.
2) remains unchanged.
3) decreases.
Q32) If the four light bulbs in the
figure are identical, which circuit
puts out more light?
1) I.
2) II.
3) The two emit the same amount of light.
Q33) An ammeter A is connected between
points a and b in the circuit below, in which
the four resistors are identical. The current
through the ammeter is
1) I/2.
2) I/4.
3) zero.
4) need more information
Q34) The light bulbs in the circuit are identical. When the switch is
closed,
1) both go out.
2) the intensity of light bulb A increases.
3) the intensity of light bulb A decreases.
4) nothing changes.
5) none of the above
Q35) The light bulbs in the circuit are
identical. When the switch is closed,
1) both go out.
2) the intensity of light bulb A increases.
3) the intensity of light bulb A decreases.
4) nothing changes.
5) none of the above
Q36) The three light bulbs in the circuit all have the same
resistance. Given that brightness is proportional to power
dissipated, the brightness of bulbs B and C together, compared
with the brightness of bulb A, is
1) twice as much.
2) the same.
3) half as much.
Q37) Consider the circuit below. Which statement(s) is correct?
 1: IAB = IBD + IBC
 2: IBC < IBD
 3: IBC > IBD
1) 1 only
2) 2 only
3) 3 only
4) 1 and 2
5) 1 and 3
Q38) A circuit with two batteries is shown below. The directions
of the currents have been chosen (guessed) as shown. Which is the
correct current equation for this circuit?
I1
1) I2 = I1 + I3
2) I1 = I2 + I3
3) I3 = I1 + I2
4) None of these.
R1
V1
R2
V2
I2 Loop 1.
R3
I3
Q39) Which equation below is the correct equation for Loop 1?
I1
I3
1) -V2 + I1R1 - I2R2 = 0
2) V2 + I1R1 - I2R2 = 0
3) -V2 - I1R1 + I2R2 = 0
4) V2 + I1R1 + I2R2 = 0
5) None of these.
R1
V1
R2
V2
I2 Loop 1.
R3
I3
Q40) A capacitor of 100 F and a resistor of 1000 Ohms are in
series. A time constant of 0.1 second means:
1) It takes 0.1 seconds to charge or discharge the capacitor
2) It takes several times 0.1 second to charge or discharge the
capacitor
3) The electrons take 0.1 seconds to move around the circuit due to
slow drift velocities
4) The electrons take 0.1 seconds to move around the circuit due to
electric forces in the capacitor
Q41) A circuit with one capacitor and one resistor is measured to
have a time constant of T. When the capacitor is replaced with 3
identical capacitors in parallel and the resistor is replaced with 2
identical resistors in parallel, what is the new time constant of the
circuit?
1)
2)
3)
4)
5)
1.0 T
1.5 T
3.0 T
5.0 T
5.0 T
Q42) A simple circuit consists of a resistor R, a capacitor C
charged to a potential Vo, and a switch that is initially open but
then thrown closed. Immediately after the switch is thrown closed,
the current in the circuit is
1) Vo/R.
2) zero.
3) need more information
Q43) The figure below shows three sections of a circuit that are to
be connected to a battery. The resistors are identical, as are the
capacitors. Rank the sections according to the time required to
reach 50% of its final charge, greatest first.
1) all tie
2) 1, 2 and 3 tie
3) 2 and 3 tie, 1
4) 1, 3, 2
5) 2, 3, 1
Q44) The four sections of circuit in the figure below are to be connected,
in turn, to the same 12 V battery. The resistors are all identical as are all
the capacitors. Rank the sections according to the time required for the
capacitors reach 50% of their final charge, greatest first.
1) 2, 1, 3 = 4
2) 3 = 4, 1, 2
3) 2 = 3, 1, 4
4) 1, 4, 2 = 3
5) none of the above
Q45) In this circuit, two capacitors in parallel are connected to a
battery through a resistor. Initially the switch is open. A long time
after the switch is closed, the current through the resistor is
1) 12.5 A
2) 12.5 mA
3) 0
4) 80 A
Q46) In the diagrams,
all light bulbs are
identical and all emf
devices are identical. In
which circuit will the
bulbs be the dimmest?
1) I
2) II
3) III
4) IV
5) V