Question

A copper rod (Q=17 x 10%)of length 30cm and the other rod are joined end to end to form a composite rod of length im at25°C
When the system is heated to 125°C, the composite rod expands by 1.91mm, Then a of other rod
(A) 2 x 10-5/°C
(B) 3 x 10-7/°C
(C) 4 x 10-?/*
(D) 5 x 10-3/0​

Answer 1

Answer:

The answer is a option D

Answer 2

Answer:

The answer is a option D