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Railways PYQCBT 1 2016

RRB NTPC · Question 88

An assertion (A) and a reason (R) are given below. Assertion (A): Electric wires are generally made of copper. Reason (R): Copper is a good conductor. Choose the correct option. A. Both A and R are true and R is the correct explanation of A. B. Both A and R are true, but R is not the correct explanation of A. C. A is true, but R is false D. A is false, but R is true

  1. D

  2. B

  3. A

  4. C

Show answer & explanation

Answer: (C) A

Explanation

Copper is used for electric wires because it is an excellent conductor of electricity (second only to silver), as well as cheap, ductile and durable. So both are true and R explains A.