Brand new Course Package released! Get 99% off your first purchase with code “99”. Find out more!
Back
0

Shopping cart

Close

No products in the cart.

Flame Institute

HomeFlame InstitutePage 3

A body of mass m is taken from earth surface to the height h equal to radius of earth, the increase in potential energy will be

(a)      mgR                                    (b) ...

49. A flywheel of moment of inertia

A flywheel of moment of inertia 0.32 kg–m2 is rotated steadily 120 rad/s at by a 50 w electric motor....

103. A metal bar of length L and area of cross-section A is clamped between two rigid supports. For the material of the rod, its Young’s modulus is Y and coefficient of linear expansion is . If the temperature of the rod is increased by

A metal bar of length L and area of cross-section A is clamped between two rigid supports. For the material...

The escape velocity from earth is

The escape velocity from earth is ves.  A body is projected with velocity 2 ves with what constant velocity will it...

30. Increase in length of a wire is 1 mm when suspended by a weight. If the same weight is suspended on a wire of double its length and double its radius, the increase in length will

30. Increase in length of a wire is 1 mm when suspended by a weight. If the same weight is...

25. The spring balance does not read properly after its long use, because   

25. The spring balance does not read properly after its long use, because (a)  The elasticity of spring increases (b) ...

21. The Young’s modulus of a rubber string 8 cm long and density

The Young’s modulus of a rubber string 8 cm long and density 1.5 kg/m3  is 5×108 N/m2 , is suspended on...

A ball is dropped from a spacecraft revolving around the earth at a height of 120 km. What will happen to the ball

(a)      It will continue to move with velocity v along the original orbit of spacecraft (b)  It will move with...

A geostationary satellite is revolving around the earth. To make it escape from gravitational field of earth, is velocity must be increased

(a)      100%                                        (b)  41.4% (c)   50%                             ...

Sexual reproduction in Spirogyra is morphologically characterised by

(a)  Oogamy (b)  Anisogamy (c)   Isogamy (d)  Isogamy and oogamy both Ans. c (8)

14. Five particles of mass = 2 kg are attached to the rim of a circular disc of radius 0.1 m and negligible mass. Moment of inertia of the system about the axis passing through the centre of the disc and perpendicular to its plane is

(a)   1 kg m2 (b)  0.1 kg m2 (c)   2 kg m2 (d)  0.2 kg m2 Ans. b (12)

Consider a satellite going round the earth in an orbit. Which of the following statements is wrong

(a)      It is a freely falling body (b)  It suffers no acceleration (c)   It is moving with a constant speed...

82. In which case there is maximum extension in the wire, if same force is applied on each wire

(a)  L = 500 cm, d = 0.05 mm (b)   L = 200 cm, d = 0.02 mm (c)   L...

128. A solid cylinder of radius R and mass M, rolls down on inclined plane without slipping and reaches the bottom with a speed v. The speed would be less than v if we use

(a)   A cylinder of same mass but of smaller radius (b)  A cylinder of same mass but of larger radius...

A body of mass m kg. starts falling from a point  2R above the Earth’s surface. Its kinetic energy when it has fallen to a point ‘R’ above the Earth’s surface [R-Radius of Earth, M-Mass of Earth, G-Gravitational Constant]           

(a)   1/4 (GMm /R)                (b) 1/6 ( (GMm /R) (c)    2/3 (GMm...

Silcones are a group of organosilicon polymers containing

a. Si – O – Si linkage b. O – Si – O linkage c. Si – C – linkage...
24.To double the length of a iron wire having  area of cross-section 0.5 cm2, the required force will be  (Y=1012 dyne/cm2)...

Buna -S rubber is which of the following of 1-3 butadiene and styrene

a.  Polymers b. Copolymer c. Addition d. Condensation polymer Ans. b (31)

23. If the length of a wire is reduced to half, then it can hold the ……… load

(a)      Half                                     ...

22. A and B are two wires. The radius of A is twice that of B. They are stretched by the some load. Then the stress on B is

(a)      Equal to that on A                     (b)  Four times that on A (c)   Two times that on A     ...

104. A symmetrical body of mass M and radius R is rolling without slipping on a horizontal surface with linear speed v. Then its angular speed is

(a)   v/R (b)  Continuously increasing (c)   Dependent on mass (d)  Independent of radius (R) Ans. a (76)

100. A solid sphere is moving on a horizontal plane. Ratio of its transitional Kinetic energy and rotational energy is

(a)    1/5 (b)   5/2 (c)   3/5 (d)   5/7 Ans. b (7)

Acceleration due to gravity ‘g’ for a body of mass ‘m’ on earth’s surface is proportional to (Radius of earth=R, mass of earth=M)

(a)        GM/R2                               (b)  m0 (c)   ...

78. An equilateral triangle ABC formed from a uniform wire has two small identical beads initially located at A. The triangle is set rotating about the vertical axis AO. Then the beads are released from rest simultaneously and allowed to slide down, one along AB and the other along AC as shown. Neglecting frictional effects, the quantities that are conserved as the beads slide down, are

      (a)  Angular velocity and total energy (kinetic and potential) (b)  Total angular momentum and total energy (c)  ...

76.

Two rigid bodies A and B rotate with rotational kinetic energies EA and EB respectively. The moments of inertia of...

61. From a uniform wire, two circular loops are made (i) P of radius r and (ii) Q of radius nr. If the moment of inertia of Q about an axis passing through its centre 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)

(a)  8 (b)  6 (c)  4 (d)  2 Ans. d (8)

24. Assertion : A body subjected to three concurrent forces cannot be in equilibrium. Reason : If large number of concurrent forces acting on the same point, then the point will be in equilibrium, if sum of all the forces is equal to zero.

(a)       If both assertion and reason are true and the reason is the correct explanation of the assertion. (b)       If...

22. Assertion : A reference frame attached to earth is an inertial frame of reference. Reason : The reference frame which has zero acceleration is called a non inertial frame of reference.

(a)       If both assertion and reason are true and the reason is the correct explanation of the assertion. (b)       If...

A geostationary satellite

(a)      Revolves about the polar axis (b)  Has a time period less than that of the near earth satellite (c)  ...

The pigment phycoerythrin is characteristic of

(a)  Green algae                       (b)  Brown algae (c)           Red algae               (d)          Blue green algae Ans. c (9)

Two identical solid copper spheres of radius R placed in contact with each other. The gravitational attracton between them is proportional to 

(a)      R2                                     ...

Which of the following statements about the gravitational constant is true

(a)      It is a force (b)  It has no unit (c)   It has same value in all systems of units...

54. Moment of inertia of a sphere of mass M and radius R is I. Keeping constant if a graph is plotted between I and R, then its form would be

Ans. d (23)

10. Assertion : A cyclist always bends inwards while negotiating a curve. Reason : By bending, cyclist lowers his centre of gravity.

(a)        If both assertion and reason are true and the reason is the correct explanation of the assertion. (b)        If...

46. A wheel of mass 10 kg has a moment of inertia of 160 kg–m2 about its own axis, the radius of gyration will be

(a)  10 m (b)  8 m                                                  (c)   6 m (d)  4 m Ans. d (44)

Assertion : A light body and heavy body have same momentum. Then they also have same kinetic energy. Reason : Kinetic energy does not depend on mass of the body.

(a)       If both assertion and reason are true and the reason is the correct explanation of the assertion. (b)       If...

27. When a ceiling fan is switched off, its angular velocity falls to half while it makes 36 rotations. How many more rotations will it make before coming to rest (Assume uniform angular retardation)

(a)       36 (b)     24 (c)     18 (d)     12 Ans. d (17)

23. The planes of two rigid discs are perpendicular to each other. They are rotating about their axes. If their angular velocities are 3 rad/sec and 4 rad/sec respectively, then the resultant angular velocity of the system would be

(a)           1 rad/sec (b)          7 rad/sec (c)           5 rad/sec (d)         √12 rad/sec Ans. c (687)

7. A 100 g iron ball having velocity 10 m/s collides with a wall at an angle 30° and rebounds with the same angle. If the period of contact between the ball and wall is 0.1 second, then the force experienced by the wall is

(a)       10 N                                                 (b)   100 N (c)   1.0 N                                       (d)   0.1 N answer : a (7)

6. If a force of 250 N act on body, the momentum acquired is 125 kg-m/s. What is the period for which force acts on the body

(a)       0.5 sec                                             (b)   0.2 sec (c)   0.4 sec                                    (d)   0.25 sec answer : a (30)

Popular posts

NEET 2026 FAQ – Syllabus, Exam Date, Preparation Tips & Course (Flame Institute)
SSC GD 2026, Notification, Apply Online, Vacancy, Eligibility, Exam Date, Syllabus, Online Form, Age Limit, PET/PST, Selection Process
KVS NVS Study Notes 2026 PDF for PGT, TGT, PRT study material | pdf download | book pdf | & More

Sign up to receive latest updates

Get in touch

Call us directly?

9888949978

Address

Flame Institute SCF 18 Near Chawla Lights Phase 7 Mohali

Email

FlameInstitute@gmail.com
Need some help?
Popular subjects
Need some help?

Youtube

2,3M Subribe

Facebook

2,3M Subribe

Instagram

2,3M Subribe

Twitter

2,3M Subribe
  • © 2025 Flame Institute.All rights reserved.
English
USD
error: Content is protected !!
Courses
Search

Search

    ArticlesCart