Question 676:

• JAMB 1992

A platinum resistance thermometer wire has a resistance of 5 ohms at 0^oC and 5.5 ohms at 100^oC. Calculate the temperature of the wire when the resistance is 5.2 ohms

A. 80^oC
B. 60^oC
C. 40^oC
D. 10^oC

Question 677:

• JAMB 1992

A bridge made of steel is 600m long. What is the daily variation in its length if the night-time and daytime temperatures are 10°C and 35°C respectively. The linear expansivity of steel is 0.000012C\(^{-1}\).

A. 0.18cm
B. 1.80cm
C. 18.00cm
D. 1800cm

Question 678:

• JAMB 1992

One of the most important applications of bi-metallic strip is found in the construction of

A. A thermostat
B. An altimeter
C. A thermocouple
D. A hydrometer

Question 679:

• JAMB 1992

At constant pressure, the density of a fixed mass of gas is

A. Constant with temperature
B. Proportional to its volume
C. Inversely proportional to its temperature
D. Independent of its volume

Question 680:

• JAMB 1992

How much heat is absorbed when a block of copper of mass 0.05kg and specific heat capacity 390Jkg^-1K^-1 is heated from 20^oC to 70^oC?

A. 39 . 98 x 10^-1J
B. 9.75 x 10²J
C. 3.98 x 10³J
D. 9.75 x 10³J