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T2 CH2 Electricity — Science STD 7 — Question

Tamilnadu BoardEnglish MediumSTD 7ScienceT2 CH2 Electricity5 Marks
Question
Explain the following :
  1. Semi – conductors
  2. Short circuit.
✓

Answer

1. The chip which are used in SIM Cards, Computers, and ATM cards are made up of semiconductors namely, silicon and germanium because of their electrical conductivity lies between a conductor and an insulator.
2. A short circuit is simply a low resistance connection between two conductors supplying electrical power to any circuit. Arc welding is a common example of the practical application of the heating due to a short circuit.

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