Properties of Solids & Liquids [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 74 - 77 of 453
Choose Programs:
📹 Video Course 2024 (8 Lectures [3 hrs : 4 mins]): Offline Support
Rs. 100.00 -OR-
1 Month Validity (Multiple Devices)
Preview All LecturesDetails
⏳ 🎯 Online Tests (5 Tests [50 questions each]): NTA Pattern, Analytics & Explanations
Rs. 500.00 -OR-
3 Year Validity (Multiple Devices)
Sample TestsDetailsSee Demo
🎓 Study Material (575 Notes): 2024-2025 Syllabus
Rs. 650.00 -OR-
3 Year Validity (Multiple Devices)
Topic-wise Notes & SampleDetails
🎯 5119 MCQs (& PYQs) with Full Explanations (2024-2025 Exam)
Rs. 750.00 -OR-
3 Year Validity (Multiple Devices)
CoverageDetailsSample Explanation
Help me Choose & Register (Watch Video) Already Subscribed?
Question 74
Question MCQ▾
Density of a substance at 0°C is 10 gm/cc and at 100°C, its density is 7.7 gm/cc. The coefficient of linear expansion of the substance will be
Choices
Choice (4) | Response | |
---|---|---|
a. | 102 | |
b. | 10-3 | |
c. | 10-2 | |
d. | 10-4 |
Question 75
Question MCQ▾
A cane is taken out from a refrigerator at 0°C. The atmospheric temperature is 25°C. If t1 is the time taken to heat from 0°C to 5°C and t2 is the time taken from 10°C to 15°C, then the wrong statements are
(1) (2)
(3) There is no relation (4)
Select the correct answers and mark it according to the following codes:
Choices
Choice (4) | Response | |
---|---|---|
a. | 1 and 2 are correct | |
b. | 1 and 3 are correct | |
c. | 1,2 and 3 are correct | |
d. | 2 and 4 are correct |
Question 76
Question MCQ▾
A steel wire of uniform cross-sectional area 4 mm2 is heated up to 60° C and clamped rigidly at two ends. If the temperature of wire falls to 40° C then change in tension in the wire will be, if coefficient of linear expansion of steel is 1.1 × 10-5 /°C and young՚s modulus of elasticity of steel is 2 × 10-6 N/m2 .
Choices
Choice (4) | Response | |
---|---|---|
a. | 144 N | |
b. | 188 N | |
c. | 176 N | |
d. | 132 N |
Question 77
Question MCQ▾
Three rods of the same dimension have thermal conductivities 4K, 2K and 2K. They are arranged as shown in fig. with their ends at 100°C, 50°C and 20°C. The temperature of their junction is
Choices
Choice (4) | Response | |
---|---|---|
a. | 70.45°C | |
b. | 67.5°C | |
c. | 35.3°C | |
d. | 50.43°C |