8) a de circuit? Power
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8)
a de circuit?
Power
Potential
A) resistivity
B) capacitance
C) resistance
D) current
9) When the current through a resistor is increased by a factor of 4, the power dissipated by ue
9)
resistor
A) increases by a factor of 16.
C) decreases by a factor of 16,
B) decreases by a factor of 4.
D) increases by a factor of 4.
10) A dielectric material such as paper is inserted between the plates of a capacitor as the capacitor
holds a fixed charge on its plates. What happens to the electric field between the plates as the
dielectric is inserted?
A) There is no change in the field.
C) The field becomes weaker.
10)
B) The field becomes stronger
D) The field reduces to zero.
11) A negatively-charged rod is brought close to (but does not touch) two neutral spheres that are in
contact with each other but insulated from the ground. If the two spheres are then separated, what
kind of charge will be on the spheres?
A) Both spheres become negative.
B) The sphere near the charged rod becomes positive and the other one becomes negative.
C) Both spheres become positive.
D) The sphere near the charged rod becomes negative and the other one becomes positive.X
11)
12) Kirchhoff's junction rule is a statement of
A) the law of conservation of charge.
12)
B) Newton's second law.
C) the law of conservation of energy.
D) the law of conservation of angular momentum.
13) A vertical wire carries a current straight down. To the east of this wire, the magnetic field points
A) south.
13)
B) east.
C) down.
D) north.
(a1s0 mens dows
14) Three identical resistors are connected in series to a 12-V battery. What is the voltage across any
one of the resistors?
14)
A) 12 V
B) 36 VX
C) À V
D) zero X
15) A neutral atom always has
15) C
A) more protons than electrons,
C) more neutrons than protons.
B) the same number of neutrons as protons.
D) the same number of protons as electrons,
ESSAY. Write your answer in the space provided or on a separate sheet of paper.
Daisy
SOUR CREAM
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