Question # 1

Which one the following is not a component of a Bipolar junction Transistor

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Base

Emitter

Collector

Grid

The special theory of relativity was presented in 1905 by

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Young

Planck

Schrodinger

Einstein

In any collision between two bodies there need nor the conservation of

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Linear momentum

Angular momentum

Total energy

Kinetic energy

The critical mass of a fissionable material is.

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1 kg

10 kg

100 kg

1.,000 kg

Which eye defect can be rectified by using diverging lens.

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Near sightedness

Far sightedness

presbyopal

Astigmatism

Two stem engine A and B have their sources at 900 K and 600 K and their sinks are at 450 K and 300 K respectively.

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They are equally efficient

A is less efficient than B

a is more efficient than B

Their efficiencies cannot be determined

For a prism of particular and given wavelength the resolving power varies as

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First power of lens of its base

Square of inverse length of its base

Increases of length of its base

Cube of the length of its base

A body of mass 8 kg moves along a circle of radius 4 m with constant speed of 88 m s-1 The centripetal force on the body is.

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10 N

128 N

48 N

148 N

They hysteresis losses are eliminated in power transformer by using

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Low resistivity power winding

Low reflectance steel cores

Laminated steel cores

soft iron cores

The angular speed of an electron in the nth orbit of Bohr's hydrogen atom is.

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Directly proportional to n

Directly proportional to n2

Inversely proportional to n

Inversely proportional to n2

In onw cycle of a steam engine there are how many dead centres.

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1

2

3

zero

Acceleration due to gravity is not affected by which one of the following

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Latitude

Attitude

Longitude

Depth

Which of the following factors determines the resolving power of an instrument.

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magnification

Total length of objective

Diameter of objective

Refractive index of objective

The permittivity of a medium.

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Is a measure of the density

Is equal to unity for air

Depends on the charge derisory of the medium

Determines the magnitude of an electric field that can be established by the medium

Which of the following is an example of induced magnetism.

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A compass needle pointing north

A north pole attracting iron filings

A northpole repelling a north pole

The coil of a motor turning in a magnetic field.

Mean life of a radioactive sample is 100 s its half life will be

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0.693 s

1 s

6.93 s

69.3 s

Minor losses through values, fittings, bends etc are modeled as proportional to

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Velocity head

Static head

total head

Pressure drop

Temperature of a system remains constant in

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Adiabatic process

Isobaric process

Isothermal process

Isochoric process

The term used for heat capacity per unit mass is.

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Latent heat

Specific heat

Energy density

Specific energy

Shadow formation and the pin hole camera illustrate the

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Phenomenon of reflection

Phenomenon of refraction

Phenomenon of total internal reflection

Rectilinear propagation of light

One particle having zero mass and zero charge is.

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Positron

Electron

Neutrino

Neutron

The nuclear model of the atom was derived partly from experiments involving the scattering of alpha particles performed by.

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Chadwick

Rutherford

Anderson

Einstein

A point source of light is situated at large distance The nature of the wave front at the point will be.

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Cylindrical

Spherical

Plane

Ellipical

On which factor cut off wavelength of X-rays coming from a Coolidge tube depends upon.

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Target material

Accelerating voltage

Filament temperature

Separation between target and the filament

Choose the one which acts as single inverter.

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Common emitter

common collector

Common base

Diode

Which one is the primary standard for temperature measurement.

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Resistance thermometer

Mercury in glass thermometer

Constant volume gas thermometer

Pyrometer

In any fluid the effect of decrease in pressure with the increase in speed in a horizontal pipe is known as

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Bernoulli's effect

Venturi effect

Torriculli's effect

Shift effect

What is the voltage a 6 Mega resistor when 3 A of current passes through it.

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2 V

9 V

18 V

36 V

The focal length of a thin converging lens is 10 cm What is the maximum distance from the lens that the object can be placed so the lens acts as a magnifying glass.

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5 cm

10 cm

15 cm

20 cm

Which of the following statement is correct for a particle moving in a horizontal circle with constant angular velocity.

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The linear momentum is constant but the K.E. varies

The K.E. is constant but the linear momentum varies

Both K.E. and linear momentum are constant

Both speed and linear velocity are constant.

What is the properly of materials that responds at an atomic or subatomic level to an applied magnetic field.

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Magnetism

electroplating

Diamagnetism

Electrolysis

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