NEET Physics Question - Thermal Physics

Assertion (A): When hot water is suddenly poured in cold beaker of thick glass, the beaker cracks.

Reason (R): Glass is bad conductor of heat and outer surface of the beaker does not expand.

(1) Both (A) & (R) are true and the (R) is the correct explanation of the (A)

(2) Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(3) (A) is true but (R) is false

(4) Both (A) and (R) are false

Solution:

Thick glass is a poor thermal conductor. When hot water is poured, the inner surface expands rapidly due to heating, while the outer surface remains cold and resists expansion.

This differential thermal expansion creates significant stress, causing the glass to crack. Both A and R are true, and R is the correct explanation for A.

Rankers Physics

Glass Beaker Cracking

Solution:

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