Physics and Measurement-Errors in Measurement [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 10 - 15 of 42
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Question 10
Question MCQ▾
A thin copper wire of length/metre increases in length by 2% when heated through 10°C. Which is not the percentage increase in area when a square copper sheet of length/metre is heated through 10°C?
Choices
Choice (4) | Response | |
---|---|---|
a. | 12% | |
b. | 14% | |
c. | 16% | |
d. | 4% |
Passage
The internal radius of a 1 m long resonance tube is measured as 3 cm. A tuning fork of frequency 2000 Hz is used. The first resonating length is measured as 4.6 cm and the second resonating length is measured as 14.0 cm.
Question 11 (1 of 3 Based on Passage)
Question MCQ▾
Calculate the maximum percentage error in measurement of e.
Choices
Choice (4) | Response | |
---|---|---|
a. | 4.33% | |
b. | 2.23% | |
c. | 5.33% | |
d. | 3.33% |
Question 12 (2 of 3 Based on Passage)
Question MCQ▾
Calculate the speed of sound at the room temperature.
Choices
Choice (4) | Response | |
---|---|---|
a. | 376 m/s | |
b. | 275 m/s | |
c. | 330 m/s | |
d. | 356 m/s |
Question 13 (3 of 3 Based on Passage)
Question MCQ▾
Calculate the end correction.
Choices
Choice (4) | Response | |
---|---|---|
a. | 0.1 cm | |
b. | 0.3 cm | |
c. | 0.4 cm | |
d. | 0.2 cm |
Question 14
Question MCQ▾
If 97.52 is divided by 2.54, the correct result in terms of significant figures is
Choices
Choice (4) | Response | |
---|---|---|
a. | 38.4 | |
b. | 38.39 | |
c. | 38.394 | |
d. | 38.937 |
Question 15
Question MCQ▾
In the context of accuracy of measurement and significant figures in expressing results of experiment, which of the following is/are correct?
- Out of the two measurements 50.14 cm and 0.00025 ampere, the first one has greater accuracy
- Out of the two measurements 50.14 cm and 0.00025 ampere, the second has greater accuracy
- If one travels 697 m by rail and 478 km by road, the total distance is 478.697 km.
- If one travels 478 km by rail and 397 m by road, the total distance travelled is 875 km.
Choices
Choice (4) | Response | |
---|---|---|
a. | 2 and 4 | |
b. | 1,2 , 3 | |
c. | 1 and 3 | |
d. | 1 and 2 |