# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 65 - 69 of 2320

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## Question number: 65

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MCQ▾

### Question

If the time period (T) of vibration of a liquid drop depends on surface tension (S), radius (r) of the drop and density (ρ) of the liquid, then the expression of T is

### Choices

Choice (4)Response

a.

T = k

b.

T = k

c.

T = k

d.

Question does not provide sufficient data or is vague

## Question number: 66

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MCQ▾

### Question

A particle moves along x-axis as x = 4 (t - 3) + a (t - 4) 2

Which of the following is true?

### Choices

Choice (4)Response

a.

The initial velocity of particle is 4

b.

The acceleration of particle is 2a

c.

The particle is at origin at t = 0

d.

None of the above

## Question number: 67

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MCQ▾

### Question

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 number: 68

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MCQ▾

### Question

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 number: 69

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MCQ▾

### Question

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%

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