Thermal Properties of Matter Test

Result

Thermal Properties of Matter Test - 82

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Question 1
4 / -1

The area of the glass of a window of a room is 10 m² and thickness 2 mm. The outer and inner temperature arc 40°C and 20°C respectively. Thermal conductivity of glass in M.K.S. system is 0.2. The heat flowing in the room per second will be

A

B

C
30 J

D
45 J

Solution
Question 2
4 / -1

The spectrum from a black body radiation is a

A
Line spectrum

B
Band spectrum

C
Continuous spectrum

D
Line and band spectrum both
Question 3
4 / -1

The top of insulated cylindrical container is covered by a disc having emissivity 0.6 and thickness 1 cm. The temperature is maintained by circulating oil as shown in figure. If temperature of upper surface of disc is 127°C and temperature of surrounding is 27°C, then the radiation loss to the surrounding will be

A

B

C

D

Solution
Question 4
4 / -1

The following figure shows two air-filled bulbs connected by a U-tube partly filled with alcohol. What happens to the levels of alcohol in the limbs X and Y when an electric bulb is placed midway between the bulbs is Lighted

A
The level of alcohol in limb X falls while that in limb Y rises

B
The level of alcohol in limb X rises while that in limb Y falls

C
The level of alcohol falls in both limbs

D
There is no change in the levels of alcohol in the two limbs
Question 5
4 / -1

Out of the following, in which vessel will the temperature of the solution be higher after the salt is completely dissolved?

A
A

B
B

C
Equal in both

D
Information is not sufficient
Question 6
4 / -1

A steel ball of mass 0.1 kg falls freely from a height of 10 m and bounces to a height of 5.4 m from the ground. If the dissipated energy in this process is absorbed by the hail, the rise in its temperature is (Specific heat of steel = 460 J kg^-1C^-2g = 10 ms^-2)

A
0.01°C

B
0.1°C

C
1°C

D
1.1°C

Solution
Question 7
4 / -1

Water falls from a height of 500 m. What is the rise in temperature of water at bottom if whole energy remains in the water?

A
0.96°C

B
1.02^oC

C
1.16°C

D
0.23°C

Solution
Question 8
4 / -1

A steel metre scale is to be ruled so that millimetre intervals are accurate within about 5 x i0 mm at a certain temperature. The maximum temperature variation allowable during the ruling is (Coefficient of linear expansion of steel = 10 × 10^-6 K^-1)

A
2°C

B
5^o C

C
7°C

D
10°C

Solution
Question 9
4 / -1

During illness, a 80 kg man ran a fever of 102.2F instead of normal body temperature of 98.6°F. Assuming that human body is mostly water, how much heat is required to raise his temperature by that amount

A
100 kcal

B
160 kcal

C
50 kcal

D
92 kcal

Solution
Question 10
4 / -1

A

B

C

D