One end of a 0.25 m long metal bar is in steam and the other is in contact with ice. If 12g of ice melts per minute, then the thermal conductivity of the metal is (Given cross section of the bar = 5 ×

Question

One end of a 0.25 m long metal bar is in steam and the other is in contact with ice. If 12g of ice melts per minute, then the thermal conductivity of the metal is (Given cross section of the bar = 5 × 10⁻⁴ m² and latent heat of ice is 80 cal g⁻¹)

A

20 cal s⁻¹ m⁻¹ °C⁻¹

B

10 cal s⁻¹ m⁻¹ °C⁻¹

C

40 cal s⁻¹ m⁻¹ °C⁻¹

D

80 cal s⁻¹ m⁻¹ °C⁻¹

Accepted Answer

80 cal s⁻¹ m⁻¹ °C⁻¹

Answer

20 cal s⁻¹ m⁻¹ °C⁻¹

Answer

10 cal s⁻¹ m⁻¹ °C⁻¹

Answer

40 cal s⁻¹ m⁻¹ °C⁻¹

STANDARD Physics Thermal Conductivity MCQ Question

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