Question

ii) The dimensional formula of torque is– (a) [M L2 T

2

], (b) [ML2T

-2

], (c) [MLT] , (d) [ML-1 T

-2

].

iii) If the error in the measurement of radius of a sphere is 2%, then the error in the determination of the

volume of the sphere will be– (a) 4%, (b) 6%, (c) 8%, (d) 2% .

iv) Temperature can be expressed as derived quantity in terms of any of the following–

(a) length and mass, (b) mass and time, (c) length, mass and time, (d) in terms of none.

v) Impulse (I) of a force (F) acting on a particle for time t is given by– (a) I=Fxt, (b) I=F/t, (c) I=t/F,

(d) none of these.

vi) The SI unit of moment of inertia is– (a) meter/second, (b) kg meter, (c) kg meter2

,(d) kg/meter2

.

vii) Which one is not conserved in uniform circular motion? – (a) Kinetic Energy, (b)Velocity Vector,

(c) Angular Velocity, (d) Angular Momentum.

viii) A 10N force applied on a body to produce in it an acceleration of 1m/s2

. The mass of the body is–

(a)15 kg, (b) 20 kg, (c) 10 kg,(d) 5 kg.

ix) The angular velocity of a body moving with a constant speed v in a circle of radius is given by–

(a) v2

/r, (b) vr, (c) v/r, (d) r/v.

x) An object at rest may have– (a) momentum, (b) potential energy, (c) velocity, (d) kinetic energy.

xi) The recoil of gun after firing a shell is due to the principle of conservation of– (a) mass, (b) linear

momentum, (c) angular momentum, (d) kinetic energy.

xii) Angular momentum L of body with the moment of inertia I and angular velocity rad/sec is equal

to– (a)





, (b) 2

, (c) , (d) none of these.

xiii) Moment of inertia of a thin circular disc of mass M and radius R about any diameter is- (a) MR2

,

(b) MR2

/4, (c) MR2

/2, (d) 2MR2

.

xiv) The angular speed of a flywheel making 120 revolutions/minute is– (a) 4 rad/s, (b) 4

2

rad/s, (c)

rad/s,(d) 2 rad/s.

xv) Kinetic energy, with any reference, must be– (a) zero, (b) positive, (c) negative, (d) both (b) & (c).

xvi) Young’s modulus is the property of– (a) solids only, (b) solids and liquids, (c) liquids and gases (d)

solids, liquids and gases.

xvii) Lubricants ________. – (a) Increase friction, (b) Reduce friction, (c) Both (a) & (b), (d) None.​

Answer 1

Answer:

only 5 point m for dmthis questions