NEET Physics: Questions 107 - 111 of 2098

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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: 107 (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

Question number: 108 (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 = hcλ 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

Passage

When an airplane flies, its total velocity with respect to the ground is v total = v plane + v wind’ where v plane denotes the plane’s velocity through motionless air,

And v wind denotes the wind’s velocity. Crucially, all the quantities in this equation are vectors. The magnitude of a velocity vector is often called the “speed. ”

Consider an airplane whose speed through motionless air is 100 meters per second (m/s). To reach its destination, the plane must fly east.

The “heading” of a plane is in the direction in which the nose of the plane points. So, it is the direction in which the engines propel the plane.

Question number: 109 (1 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

If the plane has an eastward heading, and a 20 m/s wind blows towards the southwest, then the plane’s speed is -

Choices

Choice (4) Response

a.

more than 100 m/s

b.

more than 80 m/s but less than 100 m/s

c.

80 m/s

d.

100 m/s

Question number: 110 (2 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The pilot maintains an eastward heading while a 20 m/s wind blows northward. The plane’s velocity is deflected from due east by what angle?

Choices

Choice (4) Response

a.

sin120100

b.

tan120100

c.

cos120100

d.

Question does not provide sufficient data or is vague

Question number: 111 (3 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

Let denote the answer of above question. The plane has what speed with respect to the ground?

Choices

Choice (4) Response

a.

100m/scos

b.

(100 m/s) cos

c.

(100 m/s) sin

d.

100m/ssin

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