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Should a Thermometer Bulb Have Large Heat Capacity Or Small Heat Capacity?

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प्रश्न

Should a thermometer bulb have large heat capacity or small heat capacity?

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उत्तर

The thermometer bulb should have large heat capacity because if it has lower heat capacity, it may expand at high temperatures resulting in false readings. Large heat capacity of the thermometer bulb ensures the correct reading of temperature by restricting the bulb from expanding.

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अध्याय 25: Calorimetry - Short Answers [पृष्ठ ४६]

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एचसी वर्मा Concepts of Physics Volume 1 and 2 [English]
अध्याय 25 Calorimetry
Short Answers | Q 10 | पृष्ठ ४६

संबंधित प्रश्न

Two copper spheres of radii 6 cm and 12 cm respectively are suspended in an evacuated enclosure. Each of them are at a temperature 15°C above the surroundings. The ratio of their rate of loss of heat is.................

  1. 2:1
  2. 1:4
  3. 1:8
  4. 8:1

A pinhole is made in a hollow sphere of radius 5 cm whose inner wall is at temperature 727oC. Find the power radiated per unit area. [Stefan’s constant σ = 5.7 x 10-8 J/m2 s K4 , emissivity (e) = 0.2]


1000 tiny mercury droplets coalesce to form a bigger drop. In this process, temperature of the drop _______ .

(A) increases

(B) may increase or decrease

(C) decreases

(D) does not change


The kinetic energy per molecule of a gs at temperature T is ________.

(a) `(3/2)RT`

(b) `(3/2)K_BT`

(c) `(2/3) RT`

(d) `(3/2)("RT"/M)`


A body cools from 80° C to 70° C in 5 minutes and to 62° C in the next 5 minutes. Calculate the temperature of the surroundings.


The length of a brass rod is found to be less on a hot summer day than on a cold winter day as measured by the same aluminium scale. Can we conclude that brass shrinks on heating?


The density of water at 4°C is supposed to be 1000 kg m–3. Is it same at sea level and at high altitude?


The temperature of water at the surface of a deep lake is 2°C. The temperature expected at the bottom is


A spinning wheel is brought in contact with an identical wheel spinning at identical speed. The wheels slow down under the action of friction. Which of the following energies of the first wheel decreases?

(a) Kinetic
(b) Total
(c) Mechanical
(d) Internal


In a calorimeter, the heat given by the hot object is assumed to be equal to the heat taken by the cold object. Does it mean that heat of the two objects taken together remains constant?


As the temperature is increased, the time period of a pendulum


The heat capacity of a body depends on

(a) the heat given

(b) the temperature raised

(c) the mass of the body

(d) the material of the body


A steel rod of length 1 m rests on a smooth horizontal base. If it is heated from 0°C to 100°C, what is the longitudinal strain developed?


Explain the meaning of heat and work with suitable examples.


Temperature and Heat are ______


Analogy

Evaporation:: 100°C: Freezing:: ______.


An earthen pitcher loses 1 gm of water per minute due to evaporation. If the water equivalent of the pitcher is 0.5 kg and the pitcher contains 9.5 kg of water, calculate the time required for the water in a pitcher to cool to 28°C from the original temperature of 30°C. Neglect radiation effects. The latent heat of vaporization in this range of temperature is 580 Cal/gm and the specific heat of water is 1 Cal/gm°C.


What is the SI unit of heat?


Which of the following correctly differentiates heat from temperature?


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