Q. Which instrument is used to demonstrate the expansion of solids?

ठोसों के विस्तार को प्रदर्शित करने के लिए किस उपकरण का उपयोग किया जाता है?

A
Thermometer
थर्मामीटर
B
Calorimeter
कैलोरीमीटर
C
Spherometer
गोलाकारमापी
D
Ring and ball apparatus
रिंग और बॉल उपकरण

Explanation

The ring and ball apparatus is used to demonstrate the expansion of solids. A metal ball fits through a ring at room temperature. When heated, the ball expands and no longer passes through the ring, visibly proving solid expansion.

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