# Experimental Skills (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 23 - 26 of 67

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## Question number: 23

» 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.

b.

c.

d.

## Question number: 24

» 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

## Question number: 25

» Experimental Skills » Vernier Callipers

MCQ▾

### Question

A 4 kg body and a 3 kg body are moving along the x-axis. At a particular instant the 2 kg body has a velocity of 3 ms -1 and the 3 kg body has the velocity of 2ms -1. The velocity of the center of mass at that instant is

### Choices

Choice (4) Response

a.

5 ms -1

b.

1 ms -1

c.

2.57

d.

None of the above

## Question number: 26

» Experimental Skills » Screw Gauge

MCQ▾

### Question

n the NaCl molecule, the separation between the nuclei of the two atom is about 2.36 Å (1 Å = 10 -10 m). The approximate location of the center of mass from the sodium atom, assuming the mass of chlorine atom 35.5 and mass of sodium atom is

22.98 Å

### Choices

Choice (4) Response

a.

2.212 Å

b.

1.5 Å

c.

1.24 Å

d.

l Å

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