One end of a conducting rod is maintained at temperature 50ºC and at the other end, ice is melting at 0ºC. The rate of melting of ice is doubled if :

Engineering

Physics

Conduction of Heat

Thermal Expansion

Calorimetry New

Question

One end of a conducting rod is maintained at temperature 50ºC and at the other end, ice is melting at 0ºC. The rate of melting of ice is doubled if :

Area of cross-section of rod is halved and length is doubled.

The temperature is made 100ºC and length of rod is made four times.

The temperature is made 200ºC and the area of cross-section of the rod is doubled.

The temperature is made 100ºC and the area of cross-section of rod and length both are doubled.

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$\frac{dQ}{dt} = \frac{dmL}{dt} = \frac{kAΔT}{L}$