# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1984 - 1988 of 2247

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## Question number: 1984

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MCQ▾

### Question

The radius of gyration of a disc of mass 80 g and radius 3 cm, about an axis passing through its center of gravity and perpendicular to the plane is

### Choices

Choice (4) Response

a.

2.12 cm

b.

1.76 cm

c.

3.54 cm

d.

6.54 cm

## Question number: 1985

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MCQ▾

### Question

From a uniform wire, two circular loops are made loop-P of radius r and loop-Q of radius nr. Materials of both the loops are same. If the moment of inertia of loop Q about an axis passing through its center and perpendicular to its plane is 8 times that of P about a similar axis, the value of n is (diameter of the wire is very much smaller than r or nr)

### Choices

Choice (4) Response

a.

8

b.

4

c.

2

d.

6

## Question number: 1986

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MCQ▾

### Question

At what height above the earth’s surface does the force of gravity decrease by 10%? Assume radius of earth to be 6370 km.

### Choices

Choice (4) Response

a.

150 km

b.

300 km

c.

345 km

d.

245 km

## Question number: 1987

Edit
Assertion-Reason▾

### Assertion (Ꭺ)

Moment of inertia of a particle is same, whatever be the axis of rotation.

### Reason (Ꭱ)

Moment of inertia depends on mass and perpendicular distance of the particle from its axis of rotation.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

## Question number: 1988

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MCQ▾

### Question

ABC is a triangular plate of uniform thickness. The sides are in the ratio shown in the figure. I AB, I BC, I CA are the moments of inertia of the plate about AB, BC, CA respectively. For this arrangement which one of the following relation is correct?

### Choices

Choice (4) Response

a.

b.

c.

d.

I CA is maximum

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