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Physics 4, Section
2
Feb 14, 2002
1. If the current flowing through a resistor is doubled, the power
dissipated
in the resistor will be
A) halved B) quartered
C) doubled D) quadrupled E) unchanged
2. The ratio of the effective resistance of two equal resistors in series
compared
to the effective resistance of the same two resistors in parallel
is
A) 1 B) 2
C) 4 D) 8
3. If the value of a resistor R placed across the terminals of an old
battery with
significant internal resistance is slowly increased, which of
the following remains
constant?
A) V B) õ
C) I
4. If the earth is seen as a magnet, which magnetic pole is seen at the
Earth’s
north geographic pole?
A) S
B) N
5. An electric charge is moving through space at a steady speed. As it
passes
near a second stationary charge, the second charge will feel the
effect of a
A) E-field B) B-field
C) no field D) both fields
6. How many time constants does it take to charge a capacitor to within
1% of
its final value?
A) 1 B) 2
C) 3 D) 4
E) 5
7. When an RC combination is being charged, which of the following
actually
decreases with time?
A) VC B) Q
C) C D) I
E) none of these
8. When identical circuit elements are put in parallel, their effective
value
increases. The elements are
A) batteries B) resistors
C) capacitors D) none of these
9. When discharging an RC combination, which of the following actually
increases
with time?
A) VC B) Q
C) C D) I
E) none of these
10. 1/e has a numerical value of about
A) 1 B) ½
C) 1/3 D) ¼
E) 2/3
Answers: 1-d, 2-c, 3-b, 4-a, 5-a, 6-e, 7-d, 8-c, 9-e,
10-c
Last modified on February 14, 2002
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