What are the charge carriers in (i) metals, (ii) gases, (iii) semiconductors? - Leaving Cert Physics - Question (h) - 2018
Question (h)
What are the charge carriers in (i) metals, (ii) gases, (iii) semiconductors?
Worked Solution & Example Answer:What are the charge carriers in (i) metals, (ii) gases, (iii) semiconductors? - Leaving Cert Physics - Question (h) - 2018
Step 1
(i) metals
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Answer
In metals, the primary charge carriers are electrons. These free electrons can move easily throughout the metal lattice, allowing for the conduction of electricity.
Step 2
(ii) gases
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Answer
In gases, the charge carriers can be ions and electrons. When gases are ionized, they produce positive ions and free electrons, which can contribute to electrical conduction.
Step 3
(iii) semiconductors
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Answer
In semiconductors, the charge carriers are electrons and holes. Electrons are negatively charged and can move through the material, while holes represent the absence of electrons and can also act as positive charge carriers.
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