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Heat is being supplied at a constant rat...

Heat is being supplied at a constant rate to a sphere of ice which is melting at the rate of 0.1 gm/sec. It melts completely in 100 sec. The rate of rise of temperature thereafter will be (Assume no loss of heat)

A

`0.8^@ C//sec`

B

`5.4^@ C//sec`

C

`3.6^@ C //sec`

D

will change with time

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The correct Answer is:
A
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MOTION-HEAT - 1-EXERCISE - 1 Objective Problems | JEE Main
  1. The graph shown in the figure represents change in the temperature of ...

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  2. 10 gm of ice at 0°C is kept in a calorimeter of water equivalent 10 gm...

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  3. Heat is being supplied at a constant rate to a sphere of ice which is ...

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  4. A 2100 W continuous flow geyser (instant geyser) has water inlet tempe...

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  5. A continuous flow water heater (geyser) has an electrical power rating...

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  6. Ice at 0^@C is added to 200 g of water initially at 70^@C in a vacuum ...

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  7. Four rods with different radii r and length l are used to connect two ...

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  8. Two rods A and B of different materials but same cross section are joi...

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  9. The ends of a metal bar of constant cross-sectional area are maintaine...

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  10. The wall with a cavity consists of two layers of brick separated by a ...

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  11. A rod of length L and uniform cross-sectional area has varying thermal...

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  12. A wall has two layers A and B, each made of different material. Both t...

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  13. Two metal cubes with 3 cm-edges of copper and aluminium are arranged a...

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  14. Two identical square rods of metal are welded end to end as shown in f...

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  15. A wall consists of alternating blocks withlength 'd' and coefficient o...

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  16. A cylinder of radius R made of a material of thermal conductivity K1 i...

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  17. From a black body, radiation is not :

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  18. In accordance with Kirchhoff’s law. Which of the following is incorrec...

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  19. The energy radiated by a body does not depends on

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  20. A polished metallic piece and a black painted wooden piece are kept i...

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