Fahrenheit Scale

Q. A mercury Celsius thermometer is transferred from melting ice to a hot liquid. The mercury rises to $\frac{9}{10}$th of the distance between the two fixed points. Find the temperature of the liquid in Fahrenheit scale.

1. ${162}^{\circ }\text{F}$
2. ${194}^{\circ }\text{F}$
3. ${90}^{\circ }\text{F}$
4. ${112}^{\circ }\text{F}$

Q. The temperature at which the reading of Fahrenheit thermometer will be double that of a centigrade thermometer is

1. ${160}^{\circ }\text{C}$
2. ${180}^{\circ }\text{C}$
3. ${32}^{\circ }\text{C}$
4. ${100}^{\circ }\text{C}$

Q. The temperature on the Celsius scale is ${25}^{\circ }\text{C}$. What is the corresponding temperature on the Fahrenheit scale?

1. ${40}^{\circ }\text{F}$
2. ${77}^{\circ }\text{F}$
3. ${50}^{\circ }\text{F}$
4. ${45}^{\circ }\text{F}$

Q.

The mercury falls by $\frac{8}{15}$ parts between two standard points on the Celsius thermometer when the boiling water at $100°C$ is allowed to cool to room temperature. Calculate room temperature in the Fahrenheit scale.

Q. A mercury thermometer is transferred from melting ice to hot liquid.The mercury rises to 9/10 distance between two fixed points. Find the temperature in liquid in Fahrenheit scale

1. $198$
2. $194$
3. $190$
4. $188$

Q. The temperature at which the reading of Fahrenheit thermometer will be double that of a Centigrade thermometer is:

1. ${160}^{o}C$
2. ${180}^{o}C$
3. ${32}^{o}C$
4. ${100}^{o}C$

Q. State relationship between Celsius and Fahrenheit scale ?

Q. The triple point of carbon dioxide is $216.55K$ the corresponding temperature on the celsius and Fahrenheit scale respectively are:

1. ${56.45}^{o}C,-{69.61}^{o}F$
2. $-{56.45}^{o}C,{69.61}^{o}F$
3. ${56.45}^{o}C,{69.61}^{o}F$
4. $-{56.45}^{o}C,-{69.61}^{o}F$

Q. A new scale of temperature called 'the BYJUS scale' is defined with ice point as $\frac{B}{3}$ and steam point as $\frac{B}{2}$. What temperature on Celsius belongs to $\frac{2B}{5}$?

1. 12
2. 20
3. 30
4. 40

Q.

In Newton's experiment of cooling, the water equivalent of two similar calorimeters is 10 gm each. They are filled with 350 gm of water and 300 gm of a liquid (equal volumes) separately. The time taken by water and liquid to cool from ${70}^{o}Cto{60}^{o}C$ is 3 min and 95 sec respectively. The specific heat of the liquid will be

1. 0.3 Cal/gm ´°C

2. 0.5 Cal/gm ´°C

3. 0.6 Cal/gm ´°C

4. 0.8 Cal/gm ´°C

Q. Write down the temperature of (i) lower fixed point, and (ii) upper fixed point, on the Fahrenheit scale.

Q. The temperature of first object is 36${}^o$C and that of second object is 36${}^o$F. Which is hotter than the other?

1. Second object
2. First object
3. Both have same hotness
4. Cannot be determined

Q. Length of a sonometer wire is either $95cm$ or $100cm$. In both the cases a tuning fork produces $4$ beats then the frequency of tuning fork is (in Hz)

1. $152$
2. $156$
3. $160$
4. $164$

Q. 50${}^o$C is ................ ${}^o$F

1. 132
2. 122
3. 150
4. 140

Q. The % error in MEASUREMENT of a PHYSICAL quantity m, given by m=pie tanA is minimum when 1. A=45° 2. A=30° 3. A=90° 4. A=60°

Q. A steel meter scale is to be ruled so that millimeter intervals are accurate within about $5\times {10}^{-5}mm$ at a certain temperature. The maximum temperature variation allowable during the ruling is (Coefficient of linear expansion of steel$=10\times {10}^{-6}{K}^{-1}$)

1. $2^{\circ }$ C
2. $5^{\circ }$ C
3. ${10}^{\circ }$ C
4. $7^{\circ }$ C

Q. The temperature reading of a bath on Celsius and Fahrenheit thermometers are in the ratio $2:5$. The temperature of the bath is

1. $26.67{}^{\circ }\text{C}$
2. $45.71{}^{\circ }\text{C}$
3. $36.66{}^{\circ }\text{C}$
4. $40.51{}^{\circ }\text{C}$

Q. A mercury thermometer reads 80${}^o$C when the mercury is at $5.2cm$ mark and ${60}^o$C when the mercury is at $3.9cm$ mark. The temperature (in ${}^{o}C$) when the mercury level is at $2.6cm$ mark is $4\times {10}^x$. Find the value of $x$.

Q. What is the temperature of the triple-point of water on an absolute scale whose unit interval size is equal to that of the Fahrenheit scale?

Q. the main scale of a Vernier caliper has n division per centimetre and division of the vernier scale coincide with n -1 division of Mel scale least count of vernier caliper is

Q. A person has high fever and has temperature of 315K. This temperature on Fahrenheit scale is

1. ${105.2}^{o}F$
2. ${106.5}^{o}F$
3. ${107.6}^{o}F$
4. ${108.9}^{o}F$

Q. A temperature difference of 15 ${}^{\circ }$ on the Fahrenheit scale

1. 27${}^{\circ }$
2. 59${}^{\circ }$
3. -27${}^{\circ }$
4. -59${}^{\circ }$

Q. Why do we to prefer mercury in a barometer

Q. On a Fahrenheit scale:

1. boiling point of water is ${212}^{o}F$
2. the difference between the upper fixed point and the lower fixed point is divided into $180$ equal parts
3. all the above
4. the temperature will be equal to that on the Celsius scale at $-{40}^{o}C$

Q. Fahrenheit scale divides the two fixed points into :

1. $212$ parts
2. $100$ parts
3. $32$ parts
4. $180$ parts

Q. A hot body, obeying Newton's law of cooling is cooled down from its peak value ${80}^{\circ }C$ to an ambient temperature of ${30}^{\circ }C$. It takes 5 minutes in cooling down from ${80}^{\circ }Cto{40}^{\circ }C$. How much time will it take to cool down from ${62}^{\circ }Cto{32}^{\circ }C$?
(Given $ln2=0.693,ln5=1.609$)

1. 9.6 minutes
2. 3.75 minutes
3. 8.6 minutes
4. 6.5 minutes

Q.

A faulty thermometer whos LFP is $-5^{0}C$ and UFP is ${105}^{0}C$ measures a temperature as ${80}^{0}C$. What is the correct temperature?

Q. A graph is plotted taking ${}^{\circ }C$ along the Y-axis and ${}^{\circ }F$ along the X-axis. It is a/an

1. parabola
2. straight line
3. ellipse
4. circle

Q. At what temperature.reading of F Fahrenheit scale will be 1 unit more than the reading in celsius scale.

Q. Steam at $100$${}^o$C is passed into a calorimeter of water equivalent $10$ g containing $94$ cc of H${}_2$O and $10$ g of ice at $0^o$C. The temperature of the calorimeter and contents rise by $5^o$C. The amount of steam passed is

1. 2 g
2. 3 g
3. 4 g
4. 1 g