10 Questions
Match the following materials with their classification based on electric conductivity:
Copper = Good conductor Glass = Bad conductor Germanium = Semiconductor Plastics = Bad conductor
Match the following electronic components with their base material:
Diode = Silicon Transistors = Silicon Silicon = Elemental semiconductor Germanium = Elemental semiconductor
Match the following elements with their number of electrons:
Silicon = 14 electrons Germanium = 32 electrons Copper = N/A Gold = N/A
Match the following with their usage in making electronic devices:
Gold = N/A Silicon = Base material for electronic components Germanium = Base material for electronic components Copper = N/A
Match the following with their manipulation of charges movement for electronic devices:
Silicon = Yes Germanium = Yes Copper = No Plastics = No
What are the three main categories of materials based on electric conductivity?
conductors, insulators, and semiconductors
Give an example of a good conductor material mentioned in the text.
copper
How do semiconductors differ from conductors and insulators in terms of electric conductivity?
Semiconductors have conductivity somewhere between good conductors and insulators.
What are silicon and germanium commonly used for in electronic devices?
making electronic components like diodes and transistors
How are charges movement manipulated in semiconductors for making electronic devices?
According to the need to make electronic devices.
Study Notes
Classification of Materials
- Materials are classified into three categories: conductors, insulators, and semiconductors based on their electric conductivity.
- This classification is dependent on the number of free electrons available within the materials, excluding bonded orbital electrons.
Conductors
- Metals like copper and gold are good conductors.
Insulators
- Materials like glass and plastics are very bad conductors.
Semiconductors
- Semiconducting materials like germanium and silicon have conductivity between good conductors and insulators.
- Charges movement in semiconductors can be manipulated to create electronic devices.
- Silicon and germanium are used as base materials for making electronic components like diodes, transistors, etc.
- Silicon and Germanium are elemental semiconductors.
Elemental Semiconductors
- Silicon has 14 electrons.
- Germanium has 32 electrons.
Test your knowledge of semiconductor physics with this quiz. Practice classifying materials as conductors, insulators, or semiconductors based on their electric conductivity and the number of free electrons.
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