Problems with Liquid Thermometers

Q.

In absolute scale, temperature is expressed in ________.

Q.

Backlash error is present in

1. Screw-Gauge and Vernier callipers

2. Vernier callipers and Spherometer

3. Screw – Gauge

4. All of the above

Q.

The three scales of temperature

Q. The pressure of the gas in a constant volume gas thermometer at steam point (373.15K) is $1.5\times {10}^{4}Pa$. What will be the pressure at the triple point of water ?

1. $1.10\times {10}^{4}Pa$
2. $1.50\times {10}^{4}Pa$
3. $2.10\times {10}^{4}Pa$
4. $2.50\times {10}^{4}Pa$

Q. Mercury is commonly used as a thermometric fluid rather than water because

1. specific heat of mercury is less than water
2. specific heat of mercury is more than water
3. mercury has greater visibility than water
4. density of mercury is more than the water

Q.

The normal human body temperature is $98.4°\text{F}$. If the body temperature of a person is $313\text{K}$, then the person .

1. has normal temperature

2. has a high fever.

3. has a temperature less than normal temperature.

4. nothing can be said about his health condition.

Q. The pressure of the gas in a constant volume gas thermometer at steam point (373.15K) is $1.5\times {10}^{4}Pa$. What will be the pressure at the triple point of water ?

1. $1.10\times {10}^{4}Pa$
2. $1.50\times {10}^{4}Pa$
3. $2.10\times {10}^{4}Pa$
4. $2.50\times {10}^{4}Pa$

Q. The diagram shows a bimetallic strip used as a thermostat in a circuit. The copper expands more than the invar for the same temperature rise. What will be switched on when the bimetallic strip becomes hot?

1. bell only
2. lamp, bell and motor
3. lamp and bell only
4. motor and bell only

Q. The steam point and the ice point of a mercury thermometer are marked as 80° and 20°. What will be the temperature on a centigrade mercury scale when this thermometer reads 32°?

Q. The pressure of a medium is charged from $1.01\times {10}^5$ Pa to $1.165\times {10}^5$ Pa and change in volume is 10% keeping temperature constant. The bulk modulus of the medium is.

1. $204.8\times {10}^{5}Pa$
2. $1.55\times {10}^{5}Pa$
3. $102.4\times {10}^{5}Pa$
4. $51.2\times {10}^{5}Pa$

Q.

You can use a mercury thermometer to accurately infer whether mercury expands linearly with temperature

1. True
2. False

Q. Which of the following statement(s) is/are true about constant volume gas thermometer?

1. It works on the principle of Zeroth Law of Thermodynamics
2. It is used to calibrate other thermometers
3. Both A and B
4. none of these

Q. For the construction of a thermometer, one of the essential requirements is a thermometric substance which

1. remains liquid over the entire range of temperatures to be measured
2. has a property that varies linearly with temperature
3. has a property that varies with temperature
4. obey Boyle's law

Q. Sensitivity of strain gauge implies _____.

1. Unit change in R per unit change in 'l'
2. Unit change in L per unit change in 'l'
3. Unit change in C per unit change in 'l'
4. Unit change in Y per unit change in 'l'

Q. A gas thermometer registers an absolute pressure corresponding to $325mm$ of mercury when in contact with water at the triple point . What pressure does it read when in contact with water at the normal boiling point ?