Question # 1

1 amu is equal to.

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1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-24kg

1.66 x 10^-27kg

The passage of current is accompanied by a magnetic field in the surrounding space:

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Always accompanied

Sometimes accompanied

Never accompanied

Any of above

None of these

Which waves are used in sonography?

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Microwaves

Infra red waved

Sound waves

Ultrasonic waves

The rate of change of momentum of a molecule is equal to:

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Pressure

Work

Density

Force

Referring to above figure, due to change in current in the coil P, the change in magnetic flux

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Is associated with coil P

Is associated with coil S

Causes and induced current in coil S

All of these

None of these

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

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decrease

remains the same

increase

any one of them

Photoelectric effect takes place with a photon of:

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Very high energy

Very low energy

Low energy

High energy

None of these

The SI unit of magnetic flux is.

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weber

Nm^-1A^-1

tesla

gauss

The special theory of relativity is based on:

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Four postulates

Three postulates

Two postulates

One postulate

None of these

γ-rays behave like a particle because they explain the

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Compton effect

Photoelectric effect

Pair-production

all the above

SI unit of frequency is

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second

hertz

revolution

vibrations/sec

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3 x 10⁵J

2 x 10⁵J

10⁵J

Zero

Proportion of light in an optical fibre requires that the light-should be within the fibre

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Very little confined

Largely confined

Totally confined

None of these

The SI units of displacement is

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m

kg

ms^-1

None of these

The atom or molecules in crystalline solids are held together by:

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Cohesive force

Adhesive force

Gravitational force

Magnetic forces

Bulk modulus is involved when the deformation is

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One dimensional

Two dimensional

Three dimensional

All of these

With the rise of temperature the amplitude of atoms

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Slow down

Fixed

Increases

None of these

A semiconductor is known to have an electron concentration of 8 x 10¹³ per cm³ and hole concentration of 5 x 10¹² per cm³ the semiconductor is

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n-type

P-type

Intrinsic

None of these

Two monochromatic radiations X and Y are incident normally on a diffraction grating.The second order intensity maximum for X coincides with the third order intensity maximum for Y what is the ratio wavelength of X/wavelength of Y?

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1/2

2/3

3/2

2/1

An orbital motion in which an artificial satellites adopts

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Circular path

Nearly circular path

Elliptic

None of these

A physical quantity which has both magnitude and direction but does not satisfies parallelogram law of addition

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Must be a vector

May be both scalar and vector

Scalar

None

A man pushes a wall and fails to displace it. He does

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Negative work

Positive work but not maximum work

No work at all

Maximum positive work

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