Rotational Motion (NEET Physics): Questions 64 - 67 of 125

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Question number: 64

» Rotational Motion » Radius of Gyration

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.

6.54 cm

b.

1.76 cm

c.

2.12 cm

d.

3.54 cm

Question number: 65

» Rotational Motion » Moment of Inertia

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.

6

b.

4

c.

8

d.

2

Question number: 66

» Rotational Motion » Moment of Inertia

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.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

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

d.

Ꭺ is false but Ꭱ is true

Question number: 67

» 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.

Equation

c.

Equation

d.

Equation

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