Physics E2

Why is there a constriction in a clinical thermometer?

• To give the thermometer a more sensitive temperature range

• to make thermometer a more sensitive

• to prevent Mercury breaking the bulb when it expands

• to prevent Mercury from going back to the bulb

In a liquid -in- glass, the liquid column is 2 cm long at  $0\degree C$  and it expands  10 cm when heated to $100\degree C$  .
Measure from P, how long is the liquid column at  $30\ \degree C.$  

• 2.3 cm

• 3 cm

• 5 cm

• 7 cm

Which thermometer has the greatest sensitivity and which thermometer has the greatest range?

• greatest sensitivity:P greatest range:R

• greatest sensitivity:P greatest range:S

• greatest sensitivity:Q greatest range:R

• greatest sensitivity:Q greatest range:S

Which type of thermometer is used for measuring temperature above 1000 $\degree C$  and which type is used for measuring temperatures that change rapidly ?

• measures temperatures above 1000 $\degree C$  : liquid-in-glass, measures temperature that changes rapidly:liquid-in-glass 

• measures temperatures above 1000 $\degree C$  :liquid-in-glass,  measures temperature that changes rapidly: thermocouple

• measures temperatures above 1000 $\degree C$  :thermocouple, measures temperature that changes rapidly:liquid-in-glass 

• measures temperatures above 1000 $\degree C$  :thermocouple, measures temperature that changes rapidly: thermocouple 

At 0 $\degree C$  , the length of the liquid in a glass thermometer  is 2 cm.At 100 $\degree C$  , the length of the liquid column is 22 cm.What is the length at 40 $\degree C$  

• 6 cm

• 8 cm

• 8.8 cm

• 10 cm

 A thermometer is used to measure a temperature of 80 $\degree C$ .Which thermometer is the most sensitive?

• 1st at top

• 2nd from top

• 2nd from bottom

• bottom

Which factor affects the sensitivity of the thermometer?

• the constriction

• the diameter of the bore

• the length of the glass tube

• the thickness of the glass tube

The ice point and the steam point are marked.What is the temperature shown on the thermometer?

•  $44\degree C$  

•  $56\degree C$  

•  $60\degree C$  

•  $66\degree C$  

The liquid -in-glass thermometer contains mercury.Which physical property of the mercury varies with temperature, enabling the thermometer to operate?

• mass

• melting point

• resistance

• volume

The temperature shown by a mercury -in glass thermometer increases.Which of the following is constant.

• the density of the mercury

• the internal energy of the mercury

• the mass of the mercury

• the volume of the mercury