PHYS 143 Final - Multiple Choice Questions with complete
solution 2025/2026
1.A. Capacitor A QC 28.18: Which capacitor discharges more quickly after
the switch is closed?
Capacitor A
Capacitor B
They discharge at the same rate.
Can't say without knowing the initial amount of charge.
2. A. 0 V QC 28.19: The capacitor is initially unchanged. Immediately after the switch
closes, the capacitor voltage is
A. 0 V
B. Somewhere between 0 V and 6 V
C. 6 V
D. Undefined.
3. B. Curve B QC 28.20: The red curve shows how the capacitor charges after the switch is
closed at t = 0. Which curve shows the capacitor charging if the value
of the resistor is reduced?
A. Curve A
B. Curve B
C. Curve C
D. Curve D
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, PHYS 143 Final - Multiple Choice Questions with complete
solution 2025/2026
4. C. 400 N m2/C QC 24.1: The electric flux through the shaded surface is
A. 0
B. 200 N m/C
C. 400 N m2/C
D. Flux isn't defined for an open surface.
5. A. 0 QC 24.2: The electric flux through the shaded surface is
A. 0
B. 200 N m/C
C. 400 N m2/C
D. Some other value.
6. C. 400cos70º QC 24.3: The electric flux through the shaded surface is
N
A. 0
m2/C
B. 400cos20º N m2/C
C. 400cos70º N m2/C
D. 400 N m2/C
E.Some other value
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, PHYS 143 Final - Multiple Choice Questions with complete
solution 2025/2026
7. A. Surface A QC 24.4: Surfaces A and B have the same shape and the same area. Which
has more flux. has the larger electric flux?
A. Surface A has more flux.
B. Surface B has more flux.
C. The fluxes are equal.
D. It's impossible to say without knowing more about the electric field.
8. C. The fluxes QC 24.5: Which surface, A or B, has the larger electric flux?
are equal. A. Surface A has more flux.
B. Surface B has more flux.
C. The fluxes are equal.
D. It's impossible to say without knowing more about the electric field
9. B. QC 24.7: The electric field is constant over each face of the box. The box
Negative contains
charge. A. Positive charge.
B. Negative charge.
C. No net charge.
D. Not enough information to tell.
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solution 2025/2026
1.A. Capacitor A QC 28.18: Which capacitor discharges more quickly after
the switch is closed?
Capacitor A
Capacitor B
They discharge at the same rate.
Can't say without knowing the initial amount of charge.
2. A. 0 V QC 28.19: The capacitor is initially unchanged. Immediately after the switch
closes, the capacitor voltage is
A. 0 V
B. Somewhere between 0 V and 6 V
C. 6 V
D. Undefined.
3. B. Curve B QC 28.20: The red curve shows how the capacitor charges after the switch is
closed at t = 0. Which curve shows the capacitor charging if the value
of the resistor is reduced?
A. Curve A
B. Curve B
C. Curve C
D. Curve D
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20
, PHYS 143 Final - Multiple Choice Questions with complete
solution 2025/2026
4. C. 400 N m2/C QC 24.1: The electric flux through the shaded surface is
A. 0
B. 200 N m/C
C. 400 N m2/C
D. Flux isn't defined for an open surface.
5. A. 0 QC 24.2: The electric flux through the shaded surface is
A. 0
B. 200 N m/C
C. 400 N m2/C
D. Some other value.
6. C. 400cos70º QC 24.3: The electric flux through the shaded surface is
N
A. 0
m2/C
B. 400cos20º N m2/C
C. 400cos70º N m2/C
D. 400 N m2/C
E.Some other value
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20
, PHYS 143 Final - Multiple Choice Questions with complete
solution 2025/2026
7. A. Surface A QC 24.4: Surfaces A and B have the same shape and the same area. Which
has more flux. has the larger electric flux?
A. Surface A has more flux.
B. Surface B has more flux.
C. The fluxes are equal.
D. It's impossible to say without knowing more about the electric field.
8. C. The fluxes QC 24.5: Which surface, A or B, has the larger electric flux?
are equal. A. Surface A has more flux.
B. Surface B has more flux.
C. The fluxes are equal.
D. It's impossible to say without knowing more about the electric field
9. B. QC 24.7: The electric field is constant over each face of the box. The box
Negative contains
charge. A. Positive charge.
B. Negative charge.
C. No net charge.
D. Not enough information to tell.
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20
