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Railways PYQCBT 1 2016

RRB NTPC · Question 10

Which one is not a good conductor of electricity? A. Porcelain B. Aluminum C. Tungsten D. Nickel

  1. A

  2. C

  3. D

  4. B

Show answer & explanation

Answer: (A) A

Explanation

Aluminium, tungsten and nickel are metals and conduct electricity well. Porcelain is a ceramic insulator, which is why it is used to hold electric wires on poles and in switch bodies.