Q. If the length of a cylinder on heating increases by 2%, the area of its base will increase by
A) 0.5%
B) 2%
C) 1%
D) 4%
Explanation
(d) $A \propto L^{2} \Rightarrow \frac{\mathrm{\Delta}A}{A} = 2.\frac{\mathrm{\Delta}L}{L} \Rightarrow \frac{\mathrm{\Delta}A}{A} = 2 \times 2 = 4\%$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.