Question # 1

Conventional the angular Velocity is Directed at an angle of:

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90° to the axis of rotation

30° to the axis of rotation

0° to the axis of rotation

None of above

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

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50

100

150

200

250

A body moving with uniform velocity has

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positive acceleration

negative acceleration

infinite acceleration

zero acceleration

Radioactivity was discovered by

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Rutherford

Henri Becqureal

Maxwell

James Chadwick

The capacitance of a parallel plate capacitor depends upon

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Area of the plates

Separation between the plates

Medium between the plates

All of the above

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

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Electric potential at the surface of the cube is zero

Electric potential within the cube is zero

Electric filed is normal to the surface of the cube

Electric filed varies within the cube

We can excite an atom by

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Bombardment of particles

Radiating photons

Providing potential difference

All answer are true

A curie represents a very strong source of

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α-particle

β-particle

γ-particle

none of these

An aircraft is moving with a velocity of 300 ms^-1. If all the forces acting on it are balanced, then

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It still moves with the same velocity

It will be just floating at the same point in space

It will be fall down instantaneously

It will lose its velocity gradually

Which type of wave can be set up in solids

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longitudinal waves

transverse waves

both of them

none of them

Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of

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photoelectric effect

pair production

Compton effect

uncertainty principle

In 420 days, the activity of a sample of polonium (Po) fell to one-eight of its initial value. The half-life of polonium is :

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140days

45days

87days

90days

The size of the domains in such that they can contain

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10²to 10⁴atoms

10⁴to 10⁸atoms

10⁸to 10¹²atoms

10¹²to 10¹⁶atoms

The terms phase difference and path difference are:

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Same

Different

Equal

None of these

The modulus of elasticity can be written as

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stress x strain

strain/stress

1/2 x stress x strain

stress/strain

Light year is measured in

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Time

Length

Speed

None of these

A projectile on its path gets divided into two pieces at its highest point.Which is true?

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Momentum increases

Momentum decreases

Kinetic energy increases

Kinetic energy decreases

Consider a spherical shell of metal at he centre of which a positive point charge is kept

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The electric field is zero outside the shell

The electric field is zero everywhere

The electric field is zero in the region inside the shell

The electric field is non-zero in both regions outside and inside the shell

The efficiency of a practical heat engine:

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Can be 100%

Can not be 100%

Is always Zero

None of these

The speed of sound in air is

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320 ms^-1

323 ms^-1

330 ms^-1

333 ms^-1

In multi-mode step index optical fibre, that layer is called cladding which has

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higher refractive index

lower refractive index

both of them

none of them

When the first condition of equilibrium is satisfied the body will be in

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complete equilibrium

translational equilibrium

rotational equilibrium

all of them

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