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Consequences of Anomalous Expansion

One end of a ...

Question

One end of a metal rod is kept in a furnace. In steady state, the temperature of the rod

(a) increases
(b) decreases
(c) remain constant
(d) is nonuniform

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Solution

(d) in nonuniform

In steady state, the temperature of the rod is nonuniform maximum at the end near the furnace and minimum at the end that is away from the furnace.

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Similar questions

Q. One end of a metal rod is kept in a furnace. In steady state, the temperature of the rod

(a) increases
(b) decreases
(c) remain constant
(d) is nonuniform

Q. One end A of a metallic rod length

10 cm

is inserted in a furnace whose temperature is

827^{\circ} C

. The curved surface of the rod is insulated. The room temperature is

27^{\circ} C

. When the steady state is attained, the temperature of the other end B of the rod is

702^{\circ} C

. Find the thermal conductivity of the metal

(in SI units)

Stefan's constant

= 5.67 \times 10^{- 8} {W m}^{- 2} K^{- 4}

.

Q. Assertion :Heat is supplied at constant rate from one end of a conducting rod. In steady state, temperature of all points of the rod become uniform. Reason: In steady state temperature of rod does not increase.

Q. One end of a metal rod is dipped in boiling water and the other is dipped in melting ice.

(a) All parts of the rod are in thermal equilibrium with each other.
(b) We can assign a temperature to the rod.
(c) We can assign a temperature to the rod after steady state is reached
(d) The state of the rod does not change after steady state is reached

Q. One end of a rod of length 20 cm is inserted in a furnace at 800 K. The sides of the rod are covered with an insulating material and the other end emits radiation like a blackbody. The temperature of this end is 750 K in the steady state. The temperature of the surrounding air is 300 K. Assuming radiation to be the only important mode of energy transfer between the surrounding and the open end of the rod, find the thermal conductivity of the rod. Stefan constant σ = 6.0 × 10⁻⁸ W m⁻² K⁻⁴.

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