With an increase in the thickness of insulation around a

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With an increase in the 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

Correct Option: A

With an increases in the thickness of insulation around a circular pipe, heat loss to surroundings due to convection increases and due to conduction decreases.