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%

Edit

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

Edit

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%

Edit

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

Edit