Question # 1

Light year is a unit of:

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Time

Distance

Velocity

Intensity of light

A current carrying conductor sets up its own:

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Electric field

Nuclear field

Magnetic field

Both (A) and (C)

All of these

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

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parabola

straight line

hyper bola

ellipse

Wave nature of particle was proposed by

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Einstein

Plank

De-Brogile

Max well

The electric flux is linked with a surface will be maximum when

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The surface is held parallel to the electric field

The surface is held perpendicular to the electric field

The surface makes an angle of 45° with the electric field

All of the above

While deriving equation of pressure by kinetic theory of gases, we take into account:

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Only linear motion of molecules

Only rotational motion

Only vibratory motion

All of these

Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:

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Is smaller than

Is greater than

Becomes equal to

None of these

When transistors are used in digital circuits they usually operate in the

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Active region

Breakdown region

Saturation and cutoff regions

Linear region

The missing mass which is converted to energy in the formation of nucleus, is called

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packing fraction

mass defect

binding energy

none of these

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of

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KHz

MHz

GHz

BHz

An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is

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1.66 x 10^-29m

1.74 x 10^-10cm

17.4 x 10^-6m

1.74 x 10^-10m

The right hand rule is applied to find

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The direction of a vector obtained by the vector product of two vectors

The magnitude of the vector obtained in the above manner

Neither the direction nor the magnitude

None of these

The efficiency of a practical heat engine:

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Can be 100%

Can not be 100%

Is always Zero

None of these

Stress that induces a change in the shape of the body is named as

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Tensile stress

Volumetric stress

Shear stress

None of these

Which of the following is not a perfectly inelastic collision?

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Striking of two glass balls

A bullet striking a bag of sand

An electron captured by a proton

A man jumping onto a moving cart

Cladding in an optical fiber is used to

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Absorb unneccessary light

Produce total internal reflection

Transmit light

Filter light

If the focal length of objective is 10 mm find its magnification

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18

19

20

21

A thin layer of oil on the surface of water looks colored due to:

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Diffraction of light

Reflection of light

Dispersion of light

Interference effect of light

Which of the following have same SI units

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Force

Impulse

Momentum

B and C

What are the base units of Planks constant h Remember the energy of a photon is given by hf where f element the frequency

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kgms^-1

kgm²s^-1

kgm²s^-2

kgm²s^-3

The dimensions of coefficient of viscosity are

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ML^-1T²

ML²T¹

ML^-1T¹

Nono of these

The uniformly accelerated equations are useful only for

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Angular motion

Curved motion

Linear motion

None of these

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