Thermal Properties of Matter Test

Result

Thermal Properties of Matter Test - 44

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Weekly Quiz Competition

Question 1
4 / -1

A liquid is kept in a cylindrical vessel which is rotated along its axis. The liquid rises at the sides (Fig). If the radius of the vessel is 0.05 m and the speed of rotation is 2 red/s, find the difference in the height of the liquid at the centre of the vessel and its sides.

A
20 cm

B
4 cm

C
2 cm

D
0.2 cm

Solution
Question 2
4 / -1

A fire hydrant delivers water of density ρ at a volume rate L. The water travels vertically upwards through the hydrant and then does 90^o turn to emerge horizontally at speed υ. The pipe and nozzle have uniform cross section throughout. The force exerted by water on the corner of the hydrant is

A
zero

B
ρ υ L

C

D
2 ρ υ L

Solution
Question 3
4 / -1

A block is submerged in vessel filled with water by a spring attached to the bottom of the vessel. In equilibrium, the spring is compressed. The vessel now moves downwards with an acceleration a (< g). The spring length

A
will become zero

B
will decrease but not zero

C
will increase

D
may increase or decrease or remain constant

Solution
Question 4
4 / -1

An ice block having two similar metallic pieces is floating in water in a vessel, as shown in Fig. After sometime the ice melts completely, then

A
the water level rises in the vessel

B
the water level falls in the vessel

C
the water level does not change in the vessel

D
the water level may rise or fall depending upon the ratio of masses of ice and metallic pieces

Solution
Question 5
4 / -1

recently, the phenomenon of superconductivity has been observed at 95 K. This temperature is nearly equal to

A
–288^oF

B
–146^oF

C
–368^oF

D
178^oF

Solution
Question 6
4 / -1

The temperature of a substance increases by 27^oC. On the Kelvin scale the increase is equal to

A
300 K

B
2.46 K

C
27 K

D
7 K
Question 7
4 / -1

The resistance of a resistance thermometer has values 2.71 and 3.70 ohm at 10^oC and 100^oC. The temperature at which the resistance is 3.26 ohm is

A
40^oC

B
50^oC

C
60^oC

D
70^oC

Solution
Question 8
4 / -1

No other thermometer is as suitable as a platinum resistance thermometer to measure temperature in the entire range of

A
0^oC to 100^oC

B
100^oC to 1500^oC

C
–50^oC to 350^oC

D
–200^oC to 600^oC

Solution
Question 9
4 / -1

Two rectangular blocks, having identical dimensions, can be arranged either in configuration II as shown in the figure. One of the blocks has thermal conductivity k and the other 2k. The temperature difference between the ends along the x-axis is the same in both the configurations. It takes 9 s to transport a certain amount of heat from the hot end to the cold end in the configuration I. The time to transport the same amount of heat in the configuration II is

A
2 sec

B
1 sec

C
4 sec

D
3 sec

Solution
Question 10
4 / -1

The absolute zero is the temperature at which

A
Water freezes

B
All substances exist in solid state

C
Molecular motion ceases

D
None of the above

Solution