# HW14 ```EE301
Name
Date
HW14
Instructor
Section
1) Capacitance is directly proportional to the area of the plates and inversely proportional to the
A
distance between the plates. True or False
1)
2) A parallel-plate capacitor has plates measuring 10 cm * 10 cm, spaced 1 mm apart. The dielectric is
mica with a relative permittivity of 5.0, and the permittivity of a vacuum is 8.85 x 10-12 p/m.
Which of these choices is closest to the actual capacitance value?
B) 50 pF
C) 5000 pF
D) 5 pF
2)
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I y
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3) An air-core coil consists of 100 turns of wire wrapped on a 1 cm diameter coil form 4 cm long.
What is the approximate inductance of this coil?
B) 3 mH
C) 5 uH
D) 250 uH
i
\
3)
1T
/(/**&quot;. 1
-t f
I o - ^\) If an air-core coil has an inductance of 2 pH, what will the inductance become if a
4)
inserted? Assume that the iron core has a relative permeability uT, of 1000.
A) 2 x 10-9 H
.^j^OOfTfiH
0.
•/t.
C) 2 ^H
D) 63 uH
A
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I
5) Find the Energy stored in a 120 pF capacitor if the voltage across the capacitor is 12V. Show your
work.
r~ApTftfoJ
B) 1.58 mj
C) 7.67uJ
D) 5.54 nj
d = 0.2 inch
N = 200
uQ=4n x 10-7
^ t.
A
i-&gt;
•L5 A
0.1.
5)
(\) Find the Induc
```