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WebCT Quiz
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1 of 3
11/02/2006 8:40 PM
Name:
BRYCE JONES
Start time:
February 11, 2006 8:39pm
Number of questions:
15
Finish
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Question 1
(2 points)
The conductivity of a 3.24 mmdiameter cylindrical silicon specimen if found to be 23.2 (Ohmm)
1
.
Calculate the resistance (in Ohm) of a 39.5 mm length of the specimen.
Use decimal notation, digits after decimal: 0
Answer:
Units:
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Question 2
(1 point)
The typical electrical conductivity value/range for semiconducting materials is:
a.
10
7
(Ωm)
1
b.
10
20
to 10
10
(Ωm)
1
c.
10
6
to 10
4
(Ωm)
1
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Question 3
(1 point)
The energy corresponding to the highest filled electron state at 0 K is called the _____________ energy.
Answer:
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Question 4
(2 points)
At room temperature the electrical conductivity and electron mobility for a material are 5.3 x 10
8
(Ωm)
1
and 0.0037 m
2
/Vs, respectively.
Calculate the number of free electrons per cubic meter (in m^3) for this material at room temperature.
Use scientific notation, significant figures in answer: 2
Answer:
Units:
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Question 5
(2 points)
A wafer of silicon (an intrinsic semiconductor) is connected to a battery and a lightbulb.
If a current is run through the system, will the lightbulb be
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This note was uploaded on 02/08/2010 for the course MATLS 1M03 taught by Professor Okon during the Winter '09 term at McMaster University.
 Winter '09
 OKON

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