Question

When a metal ring having some gap is heated
(a) length of gap increases
(b) radius of the ring decreases
(c) the angle subtended by the gap at the center remains same
(d) length of gap decreases

• A. only (d) is correct
• B. (a) and (b) are correct
• C. (a) & (c) are correct
• D. all are correct

Answer 1

The correct option is C (a) & (c) are correct

(a)Since expansion of a circular metal ring occurs tangentially and radially outwards therefore, if there is a gap in it then the length of the gap will increase.
(b) Radius increases on expansion
(c)Since rate of increase of gap and rate of increase in radius is same therefore, angle subtended by the gap remains same
(d)Length of the gap increases
Therefore, option(C) is correct