Physics and Measurement (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 53 - 57 of 62

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Question number: 53

» Physics and Measurement » Dimensions of Physical Quantities

MCQ▾

Question

What are the dimensions of permeability (µ 0) of vacuum?

Choices

Choice (4) Response

a.

[M L T -2 I -2]

b.

[M L T -2 I 2]

c.

[M L -1 T -2 I 2]

d.

[M L -1 T -2 I -2]

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Question number: 54

» Physics and Measurement » Dimensions of Physical Quantities

MCQ▾

Question

In S = a + bt + ct 2, S is measured in meters and t in seconds. The unit of c is

Choices

Choice (4) Response

a.

ms -2

b.

m

c.

ms -1

d.

None of the above

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Passage

Three of the fundamental constants of physics are the universal gravitational constant, G = 6.7 x 10 -11 m 3 kg -1 s -2, the speed of light, c = 3.0 x 10 8 m/s, and Planck’s constant,

h = 6.6 x 10 -34 kg m 2 s -1.

Question number: 55 (1 of 2 Based on Passage) Show Passage

» Physics and Measurement » Dimensions of Physical Quantities

MCQ▾

Question

Find the value of Planck time in seconds

The universal gravitational constant, G = 6.7 x 10 -11 m 3 kg -1 s -2, the speed of light, c = 3.0 x 10 8 m/s, and Planck’s constant, h = 6.6 x 10 -34 kg m 2 s -1.

Choices

Choice (4) Response

a.

2.3 10 -13 s

b.

1.3 10 -33 s

c.

1.3 10 - 43 s

d.

None of the above

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Question number: 56 (2 of 2 Based on Passage) Show Passage

» Physics and Measurement » Dimensions of Physical Quantities

MCQ▾

Question

The energy of a photon is given by E = If λ = 4 x 10 - 7 m, the energy of photon is

The universal gravitational constant, G = 6.7 x 10 -11 m 3 kg -1 s -2, the speed of light, c = 3.0 x 10 8 m/s, and Planck’s constant, h = 6.6 x 10 -34 kg m 2 s -1.

Choices

Choice (4) Response

a.

4.5 eV

b.

2.10eV

c.

3.0 eV

d.

3.95 eV

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Question number: 57

» Physics and Measurement » Dimensional Analysis and Its Applications

MCQ▾

Question

In an experiment the angles are required to be measured using an instrument, 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half- a degree (= 0.5°), then the least count of the instrument is:

Choices

Choice (4) Response

a.

half minute

b.

one minute

c.

one degree

d.

half degree

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