# Physics and Measurement (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 31 - 35 of 63

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## Question number: 31

» Physics and Measurement » Dimensions of Physical Quantities

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.

None of the above

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## Question number: 32

» Physics and Measurement » Errors in Measurement

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.

3%

b.

2%

c.

7%

d.

1%

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## Question number: 33

» Physics and Measurement » Errors in Measurement

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.

7%

c.

5%

d.

12%

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## Question number: 34

» Physics and Measurement » Dimensions of Physical Quantities

MCQ▾

### Question

The frequency of vibration of string is given by v = [Fm] 1/2 Here P is number of segments in the string and l is the length. The dimensional formula for m will be

### Choices

Choice (4) Response

a.

[M L 0 T -1]

b.

[M L -1 T 0]

c.

[M 0 L T -1]

d.

[M 0 L 0 T 0]

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## Question number: 35

» Physics and Measurement » Errors in Measurement

MCQ▾

### Question

The percentage errors in the measurement of mass and speed are 2 % and 3 % respectively. How much will be the maximum error in the estimation of the kinetic energy obtained by measuring mass and speed?

### Choices

Choice (4) Response

a.

1%

b.

5 %

c.

8 %

d.

11 %

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