NEET Physics: Questions 302 - 306 of 2099

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Question number: 302

» Rotational Motion » Angular Momentum

MCQ▾

Question

Two rigid bodies A and B rotate with rotational kinetic energies E A and E B respectively. The moments of inertia of A and B about the axis of rotation are I A and I B respectively. If I A = I B /4 and E A = 100 E B, the ratio of angular momentum (L A) of A to the angular momentum (L B) of B is

Choices

Choice (4) Response
a.

5

b.

25

c.

0.25

d.

1.25

Question number: 303

» Rotational Motion » Torque

MCQ▾

Question

Find the torque of a force F =-2 i + j+3 k acting at the point r = 5 i + 3 j + 2k

Choices

Choice (4) Response
a.

14i - 38j + 16k

b.

-l4i + 38j -16k

c.

-21i + 3j + 5k

d.

7i - 19j + 19k

Question number: 304

» Rotational Motion » Angular Momentum

MCQ▾

Question

The wheel of a car is rotating at the rate of 1200 revolutions per minute. On pressing the accelerator for 10 seconds, it starts rotating at 3500 revolutions per minute. The angular acceleration of the wheel is

Choices

Choice (4) Response
a.

1880 degree/sec 2

b.

1500 rad/sec 2

c.

30 rad/sec 2

d.

1980 degree/sec 2

Passage

An electric dipole (AB) consisting of two particles of equal and opposite charge and same mass is released in an electric field. In the figure field lines are without considering effect of field of dipole.

Dipole in electric field

Dipole in Electric Field

An electric dipole (AB) consisting of two particles of equal and opposite charge and same mass is released in an electric field

Question number: 305 (1 of 2 Based on Passage) Show Passage

» Electrostatics » Electric Dipole

MCQ▾

Question

The center of mass of the dipole

Choices

Choice (4) Response
a.

Has acceleration with positive x and y components

b.

Has no acceleration

c.

Has acceleration with negative x component and positive y component

d.

Has acceleration with positive x component and negative y component

Question number: 306 (2 of 2 Based on Passage) Show Passage

» Electrostatics » Electric Dipole

MCQ▾

Question

Angular acceleration of the dipole, immediately after it is released

Choices

Choice (4) Response
a.

is anticlockwise

b.

is clockwise

c.

Cannot be determined from the given information.

d.

is zero

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