NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 96 - 99 of 2184

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Question number: 96

» Physics and Measurement » Dimensions of Physical Quantities

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MCQ▾

Question

A small steel ball of radius r is allowed to fall under gravity through a column of a viscous liquid of coefficient of viscosity η. After some time the velocity of the ball attains a constant value known as terminal velocity vT The terminal velocity depends on (i) the mass of the ball m, (ii) n, (iii) r and (iv) acceleration due to gravity g. Which of the following relations is dimensionally correct?

Choices

Choice (4) Response

a.

vT

b.

vT

c.

vT rmg

d.

vT

Question number: 97

» Physics and Measurement » Errors in Measurement

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MCQ▾

Question

The mean time period of second’s pendulum is 2.00s and means absolute error in the time period is 0.05s. To express maximum estimate of error, the time period should be written as

Choices

Choice (4) Response

a.

(2.00 + 0.025) s

b.

(2.00 - 0.01) s

c.

(2.00 + 0.05) s

d.

All of the above

Question number: 98

» Kinematics » Motion in a Straight Line

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Question

the x-axis at certain times is given below

the x-axis at certain times is given below

t (s)

0

1

2

3

x (m)

-2

0

6

16

Which of the following describes the motion correctly

Choices

Choice (4) Response

a.

Uniform, decelerated

b.

Uniform, accelerated

c.

Non-uniform, accelerated

d.

All of the above

Question number: 99

» Physics and Measurement » SI Units

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MCQ▾

Question

Wavelength of ray of light is 0.00006 m. It is equal to

Choices

Choice (4) Response

a.

0.6 microns

b.

600 microns

c.

6 microns

d.

60 microns