Properties of Solids & Liquids (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 104 - 106 of 190

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Question number: 104

» Properties of Solids & Liquids » Heat Transfer » Convection

MCQ▾

Question

A room is maintained at 20°C by a heater of resistance 20 ohm connected to 400 volt mains. The temperature is uniform throughout the room and heat is transmitted through a glass window of area 4 m 2 and thickness 0.2 cm. What will be the temperature outside? Given that thermal conductivity K for glass is 0.2 cal/m/°C/sec and J = 4.2 J/cal

Choices

Choice (4) Response

a.

15.25 °C

b.

15.023 °C

c.

24.15 °C

d.

Question does not provide sufficient data or is vague

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Question number: 105

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

MCQ▾

Question

Which graph represents the variation of surface tension with temperature over small temperature ranges for water?

Choices

Choice (4) Response

a.

b.

c.

d.

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Passage

Read the passage given below and answer the questions that follow:

A bar of cross section A is subjected to equal and opposite tensile forces F at its ends. Consider a plane through the bar making an angle θ with a plane at right angles to the bar as shown in figure.

Question number: 106 (1 of 1 Based on Passage) Show Passage

» Properties of Solids & Liquids » Stress-Strain Relationship

MCQ▾

Question

The tensile stress, at this plane in terms of F, A and θ is

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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