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PH 2223
Test IIIA
April 15, 2002
Name:_____________________________________________Column:_______________
Darken the [
±
] of the letter of the correct answer. To have a chance for partial credit you
must hand in wellorganized scratch paper on which work is clearly shown. Staple the
scratch paper to the back of this test
.
eo
Constants:
m = 9.109×10
kg ,
e = 1.602×10
C ,
:
= 4
B
×
Tm/A

31

19

7
Use the circuit diagram at right for the next three problems.
1.
With the assumed directions, which equation correctly relates the
123
213
312
three currents? [a] I = I + I [b] I = I + I [c] I = I + I
2.
What is the correct Kirchhoff voltage equation for the outside loop
involving two 8
S
resistors and two batteries?
13
[a] 12v

8
S
I +
8
S
I

9v = 0 [b] 12v

8
S
8
S
+
9v = 0
[c] 12v

8
S

8
S

9v = 0 [d] 12v

8
S
8
S
+
9v = 0
[e] 12v
+
8
S
8
S

9v = 0 [f] 12v
+
8
S
8
S
+
9v = 0
3.
Keeping in mind that the assumed direction may or may not be
2
correct, what is the magnitude and direction of current I ?
[a] 3/16 A
right [b] 3/16 A
left [c] 7/16 A
right [d] 7/16 A
left [e] 15/16 A
right
[f] 15/16 A left [g] 21/16 A
right [h] 21/16 A left [i] 29/16 A
right [j] 29/16 A
left
4.
In the circuit at right, if the current is 4 A in the 4
S
resistor, what is
the current in the 1
S
resistor?
[a] 1/4 A [b] 1/
2 A [c] 1 A
[d] 2 A [e] 4 A [f] 6 A [g] 8 A [h] 16 A [i] 32 A [j] 64 A
5.
In the circuit directly below this question, if the voltage across the
4
S
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This test prep was uploaded on 04/21/2008 for the course PHY 2223 taught by Professor Ferguson during the Spring '08 term at Mississippi State.
 Spring '08
 Ferguson
 Work

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