On a new scale of temperature, which is linear and called the $$\mathrm{W}$$ scale, the freezing and boiling points of water are $$39^\circ ~\mathrm{W}$$and $$239^\circ ~\mathrm{W}$$ respectively. What will be the temperature on the new scale corresponding to a temperature of $$39^\circ ~\mathrm{C}$$ on the Celsius scale?
1. $$78^\circ ~\mathrm{C}$$
2. $$117^\circ ~\mathrm{W}$$
3. $$200^\circ ~\mathrm{W}$$
4. $$139^\circ ~\mathrm{W}$$

Subtopic:  Temperature and Heat |
83%
From NCERT
AIPMT - 2008
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If a graph is plotted between temperature of a body on degree Celsius (along y-axis) and degree Fahrenheit [along x-axis] at different temperatures, then the slope of the graph will be:

1. $\frac{5}{9}$

2. $\frac{9}{5}$

3. $\frac{3}{5}$

4. $\frac{5}{3}$

Subtopic:  Temperature and Heat |
78%
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A temperature of $$100^{\circ}\text {F}$$ (Fahrenheit scale) is equal to $$T~\text{K}$$ (Kelvin scale). The value of $$T$$ is:
1. $$310.9$$
2. $$37.8$$
3. $$100$$
4. $$122.4$$

Subtopic:  Temperature and Heat |
74%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Two absolute scales $$A$$ and $$B,$$ have triple points of water defined to be $$200 A$$ and $$350 B$$. The relationship between $$T_A$$ and $$T_B$$:
1. $$T_A = {5 \over 7}T_B$$
2. $$T_A = { 4 \over 7}T_B$$
3. $$T_A = { 6 \over 7}T_B$$
4. $$T_A = T_B$$
Subtopic:  Temperature and Heat |
73%
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The temperature of a body on the Kelvin scale is found to be x K. When it is measured by a Fahrenheit thermometer, it is found to be x$°$F, then the value of x is:
1. 40

2. 313

3. 574.25

4. 301.25

Subtopic:  Temperature and Heat |
71%
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The triple points of neon and carbon dioxide are $$24.57$$ K and $$216.55$$ K respectively. The value of these temperatures on Fahrenheit scales will be:

 1 $$-415.44^\circ ~\mathrm{F} ,~-69.88^\circ ~\mathrm{F}$$ 2 $$-248.58^\circ ~\mathrm{F} ,~-56.60^\circ~ \mathrm{F}$$ 3 $$315.44^\circ ~\mathrm{F} ,~-69.88^\circ ~\mathrm{F}$$ 4 $$415.44^\circ ~\mathrm{F} ,~-79.88^\circ~ \mathrm{F}$$

Subtopic:  Temperature and Heat |
66%
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The value of the coefficient of volume expansion of glycerin is $$5\times10^{-4}$$ K-1. The fractional change in the density of glycerin for a temperature increase of $$40^\circ \mathrm{C}$$ will be:

 1 $$0.015$$ 2 $$0.020$$ 3 $$0.025$$ 4 $$0.010$$
Subtopic:  Thermal Expansion |
81%
From NCERT
NEET - 2015
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NEET 2023 - Target Batch - Aryan Raj Singh

The coefficients of linear expansion of brass and steel rods are α1 and α2, lengths of brass and steel rods are l1 and l2 respectively. If (l2 - l1) is maintained the same at all temperatures, Which one of the following relations holds good?

1. α1l22 = α2l12

2. α12l= α22l1

3. α1l= α2l2

4. α1l= α2l1

Subtopic:  Thermal Expansion |
83%
From NCERT
NEET - 2016
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NEET 2023 - Target Batch - Aryan Raj Singh

When a uniform rod is heated, which of its following properties will increase as a result of it?
1. mass
2. weight
3. center of mass
4. moment of inertia

Subtopic:  Thermal Expansion |
73%
From NCERT
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A copper rod of $$88$$ cm and an aluminium rod of an unknown length have an equal increase in their lengths independent of an increase in temperature. The length of the aluminium rod is:
$$\left(\alpha_{Cu}= 1.7\times10^{-5}~\text{K}^{-1}~\text{and}~\alpha_{Al}= 2.2\times10^{-5}~\text{K}^{-1}\right)$$
1. $$68~\text{cm}$$
2. $$6.8~\text{cm}$$
3. $$113.9~\text{cm}$$
4. $$88~\text{cm}$$

Subtopic:  Thermal Expansion |
76%
From NCERT
NEET - 2019
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