Multiple choice

With an increase in thickness of insulation around a circular pipe, heat loss to surroundings due to

  1. convection increases, while that due to conduction decreases

  2. convection decreases, while that due to conduction increases

  3. convection and conduction decreases

  4. convection and conduction increases
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

$\text{The variation of heat transfer with the outer radius of the insulation $r_2$, when $r_1$<$r_{cr}$} $

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