# Document 10915075

```Exam PHYSICS 2Bb SPRING 2010 QUIZ 4
Name_Professor S.K. Sinha_ _ _~_ _ _ _ _ _ _ __
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Figure 26.1
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The emf and the internal resistance of a battery are as shown.
1) In Figure 26.1, when the terminal voltage Vab is equal to 31.6 V, the current through the battery, including
direction, is closest to:
rl~B
14
A) 1.2 AI from a to b
B) 1.3 A, from b to a
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1.1 A, from a to b
@.1 A, from bto a
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E) 1.2 A, from b to a
T
LfSL== 414 V
T =: I, I ctf}llflS
Figure 27.1
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Three light bulbs, A, B, and C, have electrical ratings as follows:
Bulb A - 96 W, 2.0 A
Bulb B - 200 V, 250 W
Bulb C - 120 V, 0.5 A
The three bulbs are connected in a circuit, which is across a 150-V line, as shown. Assume the filament resistances of the
light bulbs are constant and independent of operating conditions.
2)
~re
27.1, the current through bulb B is dosest to:
~75A
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B) 1.25 A
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E) 0.85 A
D) LIO A
1.00 A
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B:::: 120
RB
::::
V
Figure 27.5
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3) In Figure 27.5, the circuit R is a variable resistance. As R is decreased
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Initially, for the circuit shown, the switch S is open and the capacitor voltage is 80 V. The switch S is closed at time t = O.
4)
I~_27.1O,
the charge on the capacitor, when the current in the circuit is 33 flA, in !-le, is closest to:
~
m~
V(+) - \}
o
e,-
q~
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:&gt;
~B
(fOA
~~
~ -RQ(+)+ 9-~+-~ =0
([ net \Je+):::: QC-B ~ 'RQ(+)
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R
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