Properties of Solids & Liquids (NEET Physics): Questions 99 - 103 of 188

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Question number: 99

» Properties of Solids & Liquids » Surface Energy and Surface Tension

MCQ▾

Question

A film of water is formed between two straight parallel wires of length 10 cm each separated by 0.5 cm. If their separation is increased by 1 mm while still maintaining their parallelism, how much work will have to be done (Surface tension of water = 70 × 10 -2 N/m)

Choices

Choice (4) Response

a.

2.88 × 10 -5 Joule

b.

1.44 × 10 -5 Joule

c.

7.22 × 10 -6 Joule

d.

5.76 × 10 -5 Joule

Question number: 100

» Properties of Solids & Liquids » Young's Modulus

MCQ▾

Question

A steel wire is 6.0 m long and 2 mm in diameter. Young’s modulus of steel is 1.96 × 10 11 N/m 2. If a mass of 30 kg is suspended from it the elongation produced will be -

Choices

Choice (4) Response

a.

127 mm

b.

2.54 mm

c.

1.27 mm

d.

1.91 mm

Question number: 101

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

The coefficient of apparent expansion of mercury in a glass vessel is 153 × 10 -6 /°C and in a steel vessel is 144 × 10 -6 / 0 C If a for steel is 12 × 10 -6 / 0 C, then that of glass is

Choices

Choice (4) Response

a.

36 × 10 -6 / o C

b.

27 × 10 -6 /°C

c.

6 × 10- 6 /°C

d.

9 × 10 - 6/° C

Question number: 102

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

The volume of a solid rubber ball when it is carried from the surface to the bottom of a 150 m deep lake decreases by 0.1 %. The value for bulk modulus of elasticity for rubber will be

Choices

Choice (4) Response

a.

21 × l0 6 Pa

b.

15 × 10 -4 Pa

c.

15 × l0 8 Pa

d.

12 × l0 9 Pa

Question number: 103

» Properties of Solids & Liquids » Specific Heat Capacity

MCQ▾

Question

A student takes 50 gm wax (specific heat = 0.9 kcal/kg°C) and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are respectively.

Temperature vs time graph - specific heat = 0.9 kcal/kg°C

Temperature vs Time Graph - Specific Heat = 0.9 kcal/kg°C

In above figure we can show that effect of temperature on wax, shows that how at which state it spared

Choices

Choice (4) Response

a.

2500 cal, 50°C

b.

1500 cal, 200°C

c.

2250 cal, 200°C

d.

1000 cal, 100°C

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