Experimental Skills-Screw Gauge (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 17 - 20 of 29

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Question number: 17

» Experimental Skills » Screw Gauge

MCQ▾

Question

In the HCl molecule, the separation between the nuclei of the two atom is about 1.27 Å (1Å = 10 -10 m). The approximate location of the center of mass from the hydrogen atom, assuming the chlorine atom to be about 35.5 times massive as hydrogen is

Choices

Choice (4) Response

a.

l Å

b.

2.5 Å

c.

1.24 Å

d.

1.5 Å

Question number: 18

» Experimental Skills » Screw Gauge

MCQ▾

Question

2 bodies of different masses of 3 kg and 6 kg are moving with, velocities 20 m/s and 10 m/s towards each other due to mutual gravitational attraction. What is the velocity of their center of mass?

Choices

Choice (4) Response

a.

6 m/s

b.

5 m/s

c.

Zero

d.

8 m/s

Question number: 19

» Experimental Skills » Screw Gauge

MCQ▾

Question

If linear density of a rod of length 3m varies as λ = 2 + x them the position of the center of gravity of the rod is

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 20

» Experimental Skills » Screw Gauge

MCQ▾

Question

Choose the wrong statements about the center of mass (CM) of a system of two particles

(1) The CM lies on the line joining the two particles midway between them

(2) The CM lies on the line joining them at a point whose distance from each particle is proportional to the square of the mass of that particle

(3) The CM is on the line joining them at a point whose distance from each particle is proportional to the mass of that particle

(4) The CM lies on the line joining them at a point whose distance from each particle is inversely proportional to the mass of that particle

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 2 are correct

c.

1, 2 and 3 are correct

d.

1 and 3 are correct

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