NEET Physics: Questions 376 - 379 of 2099

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Question number: 376

» Kinematics » Uniform and Non-Uniform Motion

MCQ▾

Question

A force of ( 6i^+8j^ ) N acted on a body of mass 10 kg. The displacement after 10 sec, if it starts from rest, will be -

Choices

Choice (4) Response
a.

10 m along tan143 with x axis

b.

50 m along tan143 with x axis

c.

70 m along tan143 with x axis

d. None of the above

Question number: 377

» Laws of Motion » Force and Inertia

MCQ▾

Question

The roadway bridge over a canal is the form of an arc of a circle of radius 10 m. What is the minimum speed with which a car can cross the bridge without leaving contact with the ground at the highest point (g = 9.8 m/s 2)

Choices

Choice (4) Response
a.

7.556 m/s

b.

5.76 m/s

c.

14.654 m/s

d.

9.899 m/s

Question number: 378

» Electrostatics » Electrostatic Potential Energy

MCQ▾

Question

An electric dipole has the magnitude of its charge is q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is perpendicular to the direction of the field, the force on it and its potential energy are respectively

Choices

Choice (4) Response
a.

2q. E and minimum

b.

are zero

c.

q. E and pE

d.

q. E and pE

Question number: 379

» 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 /8 and E A = 50 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.

0. . 25

b.

2.5

c.

1.25

d.

5

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