Question # 1

How much force is required to slide one layer of the liquid over the other layer is measured by

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friction

density

viscosity

resistivity

Unit of viscosity is:

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Kg m^-1sec^-1

N s m^-2

J s m^-3

All of these

An object undergoes S.H.M has maximum speed when its displacement from the mean position is

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maximum

zero

half of the maximum value

one third of the maximum value

(CRO) Cathode ray oscilloscope is a device used for high speed

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velocity

graph plotting

time-velocity

none of these

A diatomic gas molecule has

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translational energy

rotaional energy

vibrational energy

all of them

Resistor is a device which convert electric energy to

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Heat energy

Chemical energy

Elastic energy

All of the above

Direction of motion _________ in circular motion

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Changes off and on

Changes continously

Does not change

None of them

The maximum drag force on a falling sphere is 9.8 N, it weight is

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1 N

9.8 N

4.9 N

Cannot be calculated

The value of resistivity is the least for:

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Copper

Aluminimum

Silver

Tungsten

Iron

Which of the following has a great concentration of impurity

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base

emitter

collector

none of these

A particle moving uniformly along circle its projection along diameter performs

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Linear motion

Projectile motion

SHM

Rotatory motion

Dimensions of light year are

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[LT^-1]

[ML^-1T]

[ML^-1]

[M⁰L]

A typical diffraction grating has lines per centimeter is about

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500 to 6000

400 to 5000

450 to 5500

425 to 5670

Which of the fluid has ideal behavior at low speeds

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Air

Blood

Honey

None of these

The work done by the system on its environment is considered

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Natural

Positive

Negative

None of these

Stoke s law holds for

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Cubical bodies

Cylindrical bodies

Spherical bodies

Elliptical bodies

What is the radial acceleration, when a space ship is accelerating towards the centre of the Earth at all times is

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2 g

g

1/2 g

1/4 g

The thermodynamics scale of temperature starts from

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273 K

zero

273.16 K

None of these

Slope of displacement time graph gives

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Instantaneous velocity

Instantaneous acceleration

Work done

Force

The contrast in the fringes in an interference pattern depends upon

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Fringe width

Relative intensities of the two sources

Distance between the slits

Wavelength

The relative permitivity ∈_r for germanium is

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16

17

18

22

Which is having minimum wavelength?

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X-rays

Ultra-violet rays

Y-rays

Cosmic rays

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