Heat Loss by Convection – Rankers Physics
Topic: Thermal Physics
Subtopic: Heat Transfer - Conduction and Convection

Heat Loss by Convection

Assertion (A): A hot iron bar placed under a running tap loses heat by convection.
Reason (R): Convection involves flow of matter within a fluid due to unequal temperature of its parts.
 
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Solution:

Assertion (A) is true; heat loss from a hot bar to running water is a classic example of forced convection. Reason (R) correctly defines convection as heat transfer by bulk fluid movement due to temperature differences. Thus, both are true and (R) correctly explains (A).

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