Rankers Physics
Topic: Thermal Physics
Subtopic: Thermometer

A cylindrical metal rod of length L0 is shaped into a ring with a small gap as shown. On heating the system. Image related to
x decreases, r and d increase
x and r increase, d decreases
x, r and d all increase
Data insufficient to arrive at a conclusion

Solution:

On heating an object its photographic expansion takes place. so, distance between any two point increases.

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