Q. Which instrument is best suited for measuring the internal diameter of a test tube?

टेस्ट ट्यूब के आंतरिक व्यास को मापने के लिए कौन सा उपकरण सबसे उपयुक्त है?

A
Meter scale
मीटर स्केल
B
Screw gauge
पेंच गेज
C
Vernier calipers
वर्नियर कैलीपर्स
D
Thermometer
थर्मामीटर

Explanation

Vernier calipers have inward jaws specifically designed to measure internal diameters of cylindrical objects like test tubes accurately.

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