Properties of Solids & Liquids [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 102 - 105 of 453
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Question 102
Question MCQ▾
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 m2 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. | 24.15 °C | |
b. | 15.023 °C | |
c. | 15.25 °C | |
d. | All of the above |
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Question 103
Question MCQ▾
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 104 (1 of 1 Based on Passage) Show Passage
Question MCQ▾
The tensile stress, at this plane in terms of F, A and θ is
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
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Question 105
Question MCQ▾
The force required to separate two glass plates of area 10-2 m2 with a film of water 0.05 mm thick between them, is (Surface tension of water is 70 × 10-3 N/m)
Choices
Choice (4) | Response | |
---|---|---|
a. | 38 AT | |
b. | 28 N | |
c. | 14 N | |
d. | 50 N |
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