Question

An iron and copper bimetallic strip is heated strongly, and it bends. The iron takes :

• A. the inner edge of bend
• B. the outer edge of bend
• C. can be either (A) or (B)
• D. none of the above

Answer 1

The correct option is A

the inner edge of bend

A: the inner edge of the bend

1. A brass- strip at room temperature in a straight position.
2. When this strip is heated the copper expands more as compared to iron.
3. This unequal expansion bends the strip, such that copper takes. the outer edge of the bend and iron takes the inner edge of the bend.

Hence, the correct answer is an option (A): the inner edge of the bend