Subject :NSO Class : Class 7
The diagram shows a steel ring that has been heated to 100°C At this temperature the internal and external radii of the ring are r1 and r2. When the steel ring is cooled at 0°C, then.
A r1 decreases and r2 decreases
B r1 decreases and r2 increases
C r1 increases and r2 decreases
D r1 increases and r2 increases.
Ans 1:
Class : Class 7
A