A particle of mass 100 g is thrown vertically upwards with a

Subject

Physics

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

1.

A particle starting from the origin (0, 0) moves in a straight line in the (x, y) plane. Its coordinates at a later time are 3, 3. The path of the particle makes with the x-axis an angle of

  • 30o

  • 45o

  • 60o

  • 0o


2.

A wheel has angular acceleration of 3.0 rad/s2 and an initial angular speed of 2.00 rad/s. In a time of 2 s it has rotated through an angle (in radian) of

  • 6

  • 10

  • 12

  • 4


3.

Under the influence of a uniform magnetic field a charged particle is moving in a circle of radius  R with constant speed v. The time period of the motion

  • depends on v and not on R

  • depends on both R and v

  • is independent of both R and v

  • depends on R and not on v


4.

A car moves from X to Y with a uniform speed vu and returns to Y with a uniform speed vd The average speed for this round trip is

  • 2 νd νuνd + νu

  • vu vd

  • vd vuvd + vu

  • vu + vd2


Advertisement
5.

A block B is pushed momentarily along a horizontal surface with an initial velocity v. If µ is the coefficient of sliding friction between B and the surface, block B will come to rest after a time

  • ν

  • ν

  • gν

  • νg


6.

Two satellites of earth, S1 and S2 are moving in the same orbit. The mass of S1 is four times the mass of S2. Which one of the following statements is true ?

  • The time period of S1 is four times that of S2

  • The potential energies of earth and satellite in the two cases are equal

  • S1 and S2 are moving with the same speed

  • The kinetic energies of the two satellites are equal


Advertisement

7.

A particle of mass 100 g is thrown vertically upwards with a speed of 5 m/s. The work done by the force of gravity during the time the particle goes up is

  • -0.5 J

  • -1.25 J

  • 1.25 J

  • 0.5 J


B.

-1.25 J

The height (h) traversed by particle while going up is

h = u22gh  = 252 × 9.8

Work done by gravity force = m g. h= 0.1 × g × 252×9.8cos180o

[Angle between force and displacement is 180°)

W = -0.1 × 252

⇒ W  = -1.25 J

 


Advertisement
8.

A mass of M kg is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an angle of 45° with the initial vertical direction is

  • Mg 2 + 1

  • Mg 2

  • Mg2

  • Mg 2 -1


Advertisement
9.

A force of -F k^ acts on O, the origin of the coordinate systems. The torque about the point (1, -1 ) is

  • F i^ - j^

  • - F i^ + j^

  • F i^ + j^ 

  • -F i^ - j^


10.

Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, of length L, of time T and of current I, would be

  • [ M L2 T-3 I-1]

  • [M L2 T-1]

  • [M L2 T-1 I-1]

  • [M L2 T-3 I-2 ]


Advertisement