NEET Physics: Questions 1988 - 1990 of 2099

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Question number: 1988

» Rotational Motion » Moment of Inertia

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?

Uniform triangular plate ABC with uniform thickness

Uniform Triangular Plate ABC With Uniform Thickness

In above figure we show that ABC is a triangular plate of uniform thickness.

Choices

Choice (4) Response
a.

I CA is maximum

b.

IBA>IAB

c.

IBC>IAB

d.

IAB+IBC=ICA

Question number: 1989

» Rotational Motion » Moment of Inertia

MCQ▾

Question

One quarter section is cut from a uniform circular disc of radius R. This section has mass M. It is made to rotate about a line perpendicular to its plane and passing through the centre of the original disc. Its moment of inertia about the axis of rotation is

Quarter section - cut from a uniform circular disc of radius R

Quarter Section - Cut From a Uniform Circular Disc of Radius R

In figure one quarter sector is cut from a uniform circular disc of radius R and mass M

Choices

Choice (4) Response
a.

12mr2

b.

14mr2

c.

18mr2

d.

2mr2

Question number: 1990

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

Spot the incorrect statements: The acceleration due to gravity ‘g’ decreases if

(1) We go down from the surface of the earth towards its center

(2) We go up from the surface of the earth

(3) The rotational velocity of the earth is increased

(4) We go from the poles towards the equators on the surface of the earth

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

Choices

Choice (4) Response
a.

2 and 4 are correct

b.

1, 2 and 3 are correct

c.

1 and 2 are correct

d.

1 and 3 are correct

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