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2=1x18m
2a.
Continuous Charge Distributions
a. You are standing directly beneath an electric line
running above the sideway you are on What are the size and
direction of the force on an electron in your hair when the
charge density is as shown in the figure? Assume the power
line is very long. (e = 1.6X10-19)
07
b. Consider two infinite plane sheets of charge with
charge densities as shown in the figure. The two sheets
are parallel to each other and separated by a distance L.
What is the force on a charge, Q, placed midway
between the sheets?
+ + + +
Line #
99
100
79
Competency Block Info
к с А
Description
KCA Line of Charge
KCA Sheet of Charge
к с Charge Density
11
Name
10-kirchhoff's rules problems.doc
10.
Consider the two-loop circuit shown at right.
512
a. Write two loop rule equations and one node rule
equation for this circuit. Clearly indicate your choice of
currents on the figure.
Ing.
622
32
4V
b.
Compute the voltage across the_6_2 resistor, the power dissipated in the
3. resistor, and the power delivered by the 4 V source in the middle-teger
the cirouit.
Competency Block Info
A
Description
ΚΙ Ο
Lin
e
38
39
40
41
33
к с А
К с
K К с
KC A
КС
Kirchhoff's Loop Rule
Kirchhoff's Node Rule
Selecting appropriate currents
Multi-Loop Circuit Problem L
Electrical power
4. A wire 4.00 m long and 6.00 mm in diameter has a resistance of 15 m2 at room
temperature (20 °C). A potential difference of 23 V is applied across the wire.
a.
What is the current in the wire?
b.
What is the current density in the wire?
c.
What is the resistivity of the wire material?
d. After a while, the wire material heats up to 350K. Assuming the temperature
coefficient of resistivity of the material is a = 3.9x10-'K', what is the new resistance of
the wire.
Line #
34
29
31
30
32
Competency Block Info
14 Blocks
к с А
Description
кс Ohm's Law (V-IR)
к с
Current density
К с A Resistance/resistivity relati
KIC
Conductivity/resistivity
KIC А Temperature dependence
06 - capacitor network problems.doc
Name
6.
Consider the assembly of four capacitors shown here.
4 + 6MF
(+3MF
- but
Cy3uF
a.
What is the equivalent capacitance of the assembly?
b. If the above capacitor assembly is charged to 12 Volts, how much energy is stored
in the assembly?
c.
When the assembly is charged to 12 Volts how much charge is on capacitor Cz?
d.
How would you arrange the above four capacitors so that the equivalent
capacitance is 1uF ? Sketch the arrangement and show the equivalent capacitance
calculation
- 23 -
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