Question
Which of the following statements about holes is
incorrect ?Solution
In semiconductors, a hole is the absence of an electron in the valence band and acts as a positive charge carrier . When an electron gets excited to the conduction band, it leaves behind a hole. While both electrons and holes contribute to conduction, they move differently and do not have the same mobility . Electrons generally have higher mobility than holes due to their lower effective mass and freer movement in the conduction band.
- In each sentence below, four words have been printed in bold which are numbered (1), (2), (3), and (4). One of these words may be misspelt or inappropriate...
In the following question, four words are given, out of which only one word is correctly spelt. Find the correctly spelt word.
The political retoric of foreign aggression is backed up by very brisk policing at home.
...Four words are given, out of which only one word is spelt correctly. Choose the correctly spelt word and click the button corresponding to it.
(a) Tariff (b) Tarriff
(c) Tarif (d) Tarrif
In each question below, four words printed in bold type are given. One word printed in bold might either be wrongly spelt or inappropriate in the conte...
Choose the word with the correct spelling.
Choose the correct spelling from the options given.
In the following sentence, four words or phrases have been highlighted. One of them is incorrect. Choose the INCORRECT word or phrase from the given opt...
- In each of the questions below, a sentence is given with four words highlighted in bold in the sentence. Among these bold words one may be wrongly spelt. T...
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