Question # 1

Moment of linear momentum is called.

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Moment arm

Moment of inertia

Inertia

Angular momentum

Which of the following four statements is false?

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A body can have zero velocity and still be accelerated

A body can have a constant velocity and still have a varying speed

A body can have a constant speed and still have a varying velocity

The direction of the velocity of a body can change when its acceleration is constant

The instantaneous velocity of a body moving along a circle is directed

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along the radius

along the tangent

away from the circle

none of them

Which of the following is an example of a S.H.M?

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motion of a projectile

motion of a train along a circular path

motion of swing

electrons revolving sound the nucleus

The electric field lines start from

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Positive charge

Negative charge

Either A or B

Neutron

An atom

The example of irreversible process is

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slowly liquification

slowly evaporation

an explosion

all of them

The number of LED'S needed to display all the digits is:

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Four

Five

Nine

Six

Seven

The substances which break just after the elastic limit is reached, are known as

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brittle substances

ductile substances

plastic substances

elastic substances

A rocket carries its own fuel in the form of

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liquid only

liquid or solid

liquid and solid

liquid or solid and oxygen

The velocity of a body at any instant of its motion is known as

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average velocity

instantaneous velocity

uniform velocity

none of them

The weight 'mg' of the bob is resolved into

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one component

two components

three components

four components

The approximate efficiency of fossil fuel power plants is

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20 - 27%

30 - 40%

40 - 50 %

40 - 42%

The artillery shells travels along parabolic paths under the influence of

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magnetic field

electric field

electromagnetic field

gravitational field

Newton's rings are formed due to:

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Diffractin

Interference

Polarization

Manetisation

Which of the modulus of elasticity is involved in compressing a rod to decrease its length?

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Young's modulus

Bulk modulus

Modulus of rigidity

None of the above

A wire length L and radius r is fixed at one end and force F applied another end produces an extension x The extension produced in another wire of the same material of length 2L and radius 2r by force 2F is

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1

I

21

41

The direction of torque can be determined by

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Head to tail rule

Right hand rule

Left hand rule

None of these

Which theory of gravitation is better

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Einsteins

Newtons

Lapalces

None of these

If C and R denote capacity and resistance,the dimensional formula of CR is

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M°L°T^-1

M°L°T°

Not expressible in terms of MLT

Which of the following is the most common method to obtain polarized light?

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selective absorption

reflection from different surfaces

refraction through crystals

scattering by small particles

What is the magnitude of a point charge which produces an electric field of 2 N/C at a distance of 60 cm)?

(1/4πε_∘ = 9 x 10⁹ Nm²/C²)

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8 x 10^-11 coulomb

2 x 10^-12 coulomb

3 x 10^-11 coulomb

6 x 10^-10 coulomb

The ratio of applied stress to volumetric strain is called

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shear modulus

Young's modulus

Bulk modulus

None of these

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