Q. When a metal rod is heated, its length __________.

जब किसी धातु की छड़ को गर्म किया जाता है, तो उसकी लंबाई __________ होती है।

A
Decreases
कम हो जाती है
B
Increases
बढ़ता है
C
Remains constant
स्थिर रहता है
D
First increases, then decreases
पहले बढ़ता है, फिर घटता है

Explanation

Heating a metal rod causes its atoms to vibrate more and push away from each other slightly, resulting in an increase in length. This is a manifestation of linear expansion.

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