Solid State Physics II - SS3 Physics Past Questions and Answers - page 2
11
Which of the following materials has the highest electrical conductivity?
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A
Copper
B
Silver
C
Gold
D
Aluminum
12
Which of the following materials has the highest resistivity?
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A
Silver
B
Copper
C
Gold
D
Tungsten
15
What is the main function of a diode in a circuit?
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A
To amplify the current
B
To regulate the voltage
C
To rectify the current
D
To increase the resistance
16
Which of the following is NOT a type of transistor?
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A
Bipolar junction transistor (BJT)
B
Field-effect transistor (FET)
C
Metal-oxide-semiconductor field-effect transistor (MOSFET)
D
Capacitive junction transistor (CJT)
17
What is the main difference between a diode and a transistor?
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A
A diode has only one semiconductor material while a transistor has two.
B
A diode can only conduct current in one direction while a transistor can conduct in both.
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C
A transistor can only amplify a signal while a diode cannot.
D
A diode can only be used as a switch while a transistor can be used as both a switch and an amplifier.
18
Which of the following statements is true about a P-N junction in a diode?
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A
The P-type material has an excess of electrons, while the N-type material has a deficiency of electrons.
B
The P-type material has a deficiency of electrons, while the N-type material has an excess of electrons.
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C
Both the P-type and N-type materials have an excess of electrons.
D
Both the P-type and N-type materials have a deficiency of electrons.
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