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Question (21)
QN0035717
  1. The table gives the initial length , change in temperature  and change in length  of four rods. The rod, which has greatest coefficient of expansion?                                                                                                  

Rod

2

10

1

20

2

10

4

5

  • (A)

    a

  • (B)

    b

  • (C)

    c

  • (D)

    d

Correct Answer: C
Explanation:

; It found greatest for  (c).

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Question (22)
QN0035718

Two different wires having lengths  and , and respective temperature coefficient of linear expansion  and , are joined end-to-end. Then the effective temperature coefficient of linear expansion is :   

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: A
Explanation:

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