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Heat Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

A steel sphere of diameter 50 cm is resting on a circular ring made up of Brass of radius 24.8 cm. Both the measurements are at room temperature of 20°C. If the coefficient of linear expansion of Steel and Brass are 1.2 x 10^-5/°C and 1.8 x 10^-5/°C, then the temperature at which the sphere will fall down is

A
1400 °C

B
1500 °C

C
1286°C

D
1386 °C
Question 2
1 / -0

A container having certain amount of liquid expels 1/200^th of its mass on heating through a temperature range of 200°C. Then the apparent coefficient of expansion of the liquid is

A
3.5 x 10^-5 /°C

B
2.25 x 10^-5 /°C

C
2.75 x 10^-5 /°C

D
2.5 x 10^-5 /°C
Question 3
1 / -0

The change in temperature required to increase the length of a rod by 0.12% of its original lenght L is_____ (Given that the coefficient of linear expansion is 1.2 x 10^-5 /°C)

A
50°C

B
100°C

C
75°C

D
80°C
Question 4
1 / -0

The door of a running refrigerator inside a closed room was left open. Which of the following observations will be seen?

A
The room will be warmed up gradually.

B
The temperature of the room will remain unaffected.

C
The room will become as cold as the refrigerator.

D
The room will be cooled slightly.
Question 5
1 / -0

The difference between the Fahrenheit scale and Celsius scale of a temperature is 80. The temperature in Celsius scale is

A
70°C

B
30°C

C
60°C

D
80°C
Question 6
1 / -0

Railway tracks are usually laid during winter times. The rails are of length 10 m. The difference in peak temperatures in India is 50°C. Then the length of the gap between the two rails that should accommodate the expansion of rails due to the change in temperature is
(Coefficient of Linear expansion of Iron = 1.2 x 10^-5/°C)

A
10 mm

B
6 mm

C
8 mm

D
6 cm
Question 7
1 / -0

The coefficients of linear expansion of Copper and Nickel are 1.7 x 10^-5 /°C and 1.2 x 10^-5 /°C respectively. The lengths of the copper strip such that the difference in length between it and the Nickel strip is always 20 cm at all temperatures is

A
68 cm

B
48 cm

C
40 cm

D
38 cm
Question 8
1 / -0

There are two rings one made up of Copper of radius 1.59 cm and the other of Nickel of radius 1.6cm. The temperature at which one will fit into the other is
(Coefficients of linear expansion of Copper and Nickel are 1.7 x 10^-5 /°C and 1.2 x 10^-5 /°C respectively)

A
1289°C

B
1177°C

C
1377°C

D
1277°C
Question 9
1 / -0

A cubic crystal of dimension 3 x 10^-12 m at 293 K, has coefficient of linear expansion along its length as 13 x 10^-7 /°C but along breadth and height it has the coefficient of linear expansion of 231 x 10^-7 /°C. If temperature of the crystal is increased to 393 K, then the change in volume is

A
1.2825 x 10^-37 cu cm

B
1.2825 x 10^-36 cu m

C
1.2825 x 10^-37 cu m

D
1.2285 x 10^-37 cu m

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Re-Attempt Weekly Quiz Competition

Heat Test - 2

Result

Heat Test - 2

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SHARING IS CARING

Question 1

1400 °C

1500 °C

1286°C

1386 °C

Question 2

3.5 x 10-5 /°C

2.25 x 10-5 /°C

2.75 x 10-5 /°C

2.5 x 10-5 /°C

Question 3

50°C

100°C

75°C

80°C

Question 4

The room will be warmed up gradually.

The temperature of the room will remain unaffected.

The room will become as cold as the refrigerator.

The room will be cooled slightly.

Question 5

70°C

30°C

60°C

80°C

Question 6

10 mm

6 mm

8 mm

6 cm

Question 7

68 cm

48 cm

40 cm

38 cm

Question 8

1289°C

1177°C

1377°C

1277°C

Question 9

1.2825 x 10-37 cu cm

1.2825 x 10-36 cu m

1.2825 x 10-37 cu m

1.2285 x 10-37 cu m

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3.5 x 10^-5 /°C

2.25 x 10^-5 /°C

2.75 x 10^-5 /°C

2.5 x 10^-5 /°C

1.2825 x 10^-37 cu cm

1.2825 x 10^-36 cu m

1.2825 x 10^-37 cu m

1.2285 x 10^-37 cu m