NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics: Questions 67 - 70 of 5119
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Question 67
Question MCQ▾
Error in the measurement of radius of a circle is 1% . The error in the calculated value of its area is
Choices
Choice (4) | Response | |
---|---|---|
a. | 1% | |
b. | 2% | |
c. | 7% | |
d. | 3% |
Question 68
Question MCQ▾
a particle moving in a straight line covers half the distance with speed of 3 m/s. The other half of the distance is covered in two equal time intervals with speed of 4.5 m/s and 7.5 m/s respectively. The average speed of the particle during this motion is
Choices
Choice (4) | Response | |
---|---|---|
a. | 4.0 m/s | |
b. | 5.5 m/s | |
c. | 4.8 m/s | |
d. | 5.0 m/s |
Question 69
Question MCQ▾
A physical quantity A is related to four observable a, b, c and d as follows, A =
the percentage errors of measurement in a, b, c and d are 1% , 3% , 2% and 2% respectively. What is the percentage error in the quantity A?
Choices
Choice (4) | Response | |
---|---|---|
a. | 14% | |
b. | 12% | |
c. | 5% | |
d. | 7% |
Question 70
Question MCQ▾
A plane is to fly due north. The speed of the plane relative to the air is 200 km/h, and the wind is blowing from west to east at 90 km/h.
(1) The plane should head in a direction of sin-1 (0.45)
(2) The plane should head in a direction of sin-1 (0.60)
(3) The relative velocity of plane w. r. t. ground is 179 km/h
(4) The relative velocity of plane w. r. t. ground is 149 km/h
Choices
Choice (4) | Response | |
---|---|---|
a. | 2 and 4 | |
b. | 1 and 2 | |
c. | 1,2 and 3 | |
d. | 1 and 3 |