Question # 1

The vector is space has:

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One Component

Two Compnents

Three Components

Non of these

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

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2.0 x 10^-5/°C

4.0x10^-5/°C

6.0x10^-5/°C

2.33x10^-5/°C

A potential barrier of 0.7V exists across p-n junction made from:

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Germanium

Silicon

Arsenic

Gallium

Indium

The speed of sound in a medium depends on

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The elastic property but not on the inertia property

The inertia property but not on the elastic property

The elastic property as well as the inertia property

Neither the elastic property nor the inertia property

Zirconia is classified as:

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Ceramic solid

Ionic compound

Metal

Either (A) or (B)

Either (B) or (C)

Which of the following waves are more energetic

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radio waves

infrared waves

ultraviolet

γ-rays

Three quarks make:

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An electron

A meson

A baryon

A photon

None of these

During the positive half-cycle in the half-wave rectification,the diode

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does not conduct

conducts

either of these

neither of these

An electric charge at rest is

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Only an electric field

Only a magnetic field

Both electric and magnetic fields

None of the above

The electric intensity at infinite distance from the point charge will be

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Infinite

Positive

Zero

Negative

Which instrument is expensive and difficult to use?

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Voltmeter

Potentiometer

CRO

Both A and C

Both A and B

A particle having mass and charge equal to that of an electron is called:

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Proton

Positron

Pion

Pi-meson

Both (C) and (D)

One mole of any substance contain

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same number of molecules

different number of molecules

may be same or different

none of them

In an A.C. circuit, a resistance of R ohm is connected in series with an inductance L. If phase angle between voltage and current be 45°. the value of inductive reactance will be

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R/4

R/2

R

Cannot be found with the given data

The rectangular components of a vector are equal in magnitude when the vector makes and angle _______with their x-component:

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0°

30°

45°

60°

A body of weight 1 N has a kinetic energy of 1 joule when its speed is:

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1.46 m sec^-1

2.44 m sec^-1

3.42 m sec^-1

4.43 m sec^-1

One radian is:

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Greater than one degree

Less than one degree

Equal to one degree

None of these

Physical quantities are often divided into ______ categories

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3

2

9

5

The field in which work done is moving body between two points depends upon the path followed is called:

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Conservative filed

Non-conservative field

Electric field

None of these

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

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Fringe width will decrease

Fringe width will increase

Fringe width will remain unchanged

Fringe will become less intense

The idea of quantization of energy was proposed by:

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Einstein

Max.Planck

Maxwell

Bohr

Rutherford

The projectile motion is composed of

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horizontal motion only

vertical motion only

horizontal and vertical motion

none of them

In case of point, source of light shape of wavefront is:

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Spherical

Cylindrical

Plane

None of these

While describing the motion of a simple pendulum, the frictional effects are

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taken into account

completely ignored

partially ignored

none of them

The concept of direction is purely:

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Absolute

Relative

Relative to stars always

Relative to the sun always

None of these

Which branch of physics deals with the structure and properties of solids

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Atomic Physics

Plasma Physics

Molecular Physics

Solid state physics

A motorist travels A to B at a speed at 40 km/h and returns at speed of 60km/h. His average speed will be

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40 km/h

48 km/h

50 km/h

60 km/h

Compton shift refers to:

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Photon

Meson

Proton

Positron

Both (B) and (D)

An object in SHM will have maximum speed when its displacement from equilibrium position is:

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Infinity

Maximum

Zero

Minimum

Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in

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1916

1919

1921

1923

The tidal energy is due to gravitational pull of :

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sun

moon

Mars

None of these

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