Temperature and Thermometers
Learn about different types of thermometers, temperature scales, and how temperature is measured using various instruments including clinical, mercury, alcohol, and gas thermometers.
Questions
The range of a clinical thermometer is
- 0-100$^0$C
- 32-214$^0$F
- 0-1273$^0$C
- 35-42$^0$C
At low temperatures ________ type of thermometer is used.
- mercury thermometer
- water thermometer
- alcohol thermometer
- thermometers cannot be used
The most commonly used thermometric substance is
- water
- alcohol
- mercury
- steam
State whether given statement is True or False
The upper standard point of a thermometer is 273 K
- True
- False
A Fahrenheit thermometer registers $107^{o}F$ while a faulty Celsius thermometer registers $42^{o}C$. Find the error in the later
- $0.37^{o}$
- $0.87^{o}$
- $0.67^{o}$
- $48$
The pressure of a gass filled in the bulb of a constant volume gas thermometer at temperatures $0^{o}C$ and $100^{o}C$ are $27.50\ cm$ and $37.50\ cm$ of $Hg$ respectively. At an unknown temperature the pressure is $32.45\ cm$ of $Hg$. Unknown temperature is
- $30^{o}C$
- $39^{o}C$
- $49.5^{o}C$
- $29.6^{o}C$
Mercury thermometers can be used to measure temperatures upto:
- $100^{o}C$
- $212^{o}C$
- $360^{o}C$
- $500^{o}C$
We cannot use mercury thermometer at low temperatures because:
- Glass might break down at low temperature.
- Heat does not flow from the body whose measurement we are taking with the thermometer.
- At low temperatures mercury becomes transparent and it becomes difficult to take the readings.
- Mercury freezes at low temperatures.
Mercury is commonly used as a thermometric fluid rather than water because
- specific heat of mercury is less than water
- specific heat of mercury is more than water
- mercury has greater visibility than water
- density of mercury is more than the water
A thermometer is gradated in millimeters . It registers -3 mm when the bulb of themometer is a pure melting ice and 22 mm when the thermometer is in stem at a pressure of 1 atmosphere. The temperature in $^{ \circ }C$ when the thermometer registers 13 mm is
- $\frac { 13 }{ 25 } \times 100$
- $\dfrac { 16 }{ 25 } \times 100$
- $\dfrac { 13 }{ 22 } \times 100$
- $\dfrac { 16 }{ 22 } \times 100$
The temperature of a normal human being is
- $31^{o} C$
- $37^{o} C$
- $20^{o} C$
- $50^{o} C$
Name the device which is used to measure temperature.
- Caloriemeter
- Thermometer
- Vermier calliper
- None
To mark a temperature scale on a thermometer, standard temperatures knows as fixed points are needed.
Which of these is a fixed point on the Celsius scale?
- room temperature
- the temperature inside a freezer
- the temperature of pure melting ice
- the temperature of pure warm water
The range of clinical thermometer is
- $37^{o}C$ to $42^{o}C$
- $95^{o}F$ to $110^{o}F$
- $90^{o}F$ to $112^{o}F$
- $95^{o}C$ to $104^{o}C$
A thermometer is used to measure
- heat
- thermal capacity
- water equivalent
- temperature
A mercury thermometer, with a concave reflector behind the bulb, is placed in front of an electric fire. Which of the following combinations will cause the smallest reading on the thermometer?
- Black reflector, black bulb
- Black reflector, shiny bulb
- Shiny reflector, shiny bulb
- Remains same
A________is used to measure temperature
- Thermometer
- Barometer
- Manometer
- None of these
Water is better thermometric liquid
- True
- False
State whether given statement is True or False
Thermometer measures the heat energy in a body
- True
- False
- True
- False
Name the device for detecting and measuring small amount of thermal energy.
- Pyranometer
- Pyrometer
- Barrater
- Bolometer
State whether true or false :
A gas thermometer measures temperature with the variation in pressure or volume of a gas.
- True
- False
The resistance of a platinum wire of a platinum resistance thermometer at the ice point is $5 \Omega$ and at steam point is $5.4 \Omega$. When the thermometer is inserted in a hot bath, the resistance of the platinum wire is $6.2 \Omega$. Find the temperature of the hot bath.
- $300^\circ C$
- $30^\circ C$
- $3000^\circ C$
- $300 \ K$
A thermometer uses
- water
- mercury
- air
- none
45 gm of alcohol are needed to completely fill up a weight thermometer at $15^{\circ}C$. Find the weight of alcohol which will overflow when the weight thermometer is heated to $33^{circ}C$.
(Given ${ \gamma } _{ a }=121\times { 10 }^{ -5 }{ { \circ } _{ C } }^{ -1 }$
- 0.96 gm
- 0.9 gm
- 1 gm
- 2 gm
Consider two thermometers $T _1$ and $T _2$ of equal length which can be used to measure temperature over the range $\theta _1$ and $\theta _2$. $T _1$ contains mercury as thermometric liquid while $T _2$ contains bromine. The volumes of the two liquids are the same at the temperature $\theta _1$. The volumetric coefficients of expansion of mercury and bromine are $18\times 10^{-5}K^{-1}$ and $108\times 10^{-5}K^{-1}$, respectively. The increase in length of each liquid is the same for the same increase in temperature. If the diameters of the capillary tubes if the two thermometers are $d _1$ and $d _2$ respectively, then the ratio $d _1:d _2$ would be closest to.
- $6.0$
- $2.5$
- $0.5$
- $0.4$
Which of the following statements is correct?
- Air escaping from a punctured tyre feels cold
- When a gas under high pressure is permitted to expand into a region of low pressure, it gains in temperature
- The reading on a thermometer immersed in boiling water varies as the heat increases or decreases above the boiling point
- None of the above statements is correct