Question # 1

Transformer make possible the

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transmission of A.C. power

conversion of AC and D.C

Cyclotron

Particle accelerator

Which thermodynamic law state taht the entropy of a perfect system approaches zero.

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Zeroth law of thermodynamics

First law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

X-rays used for

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Cutting boring and precision welding

Retina stitching in eye operations

Detecting heavy elements under the earth

Deflecting flaws in welding and casting

The quality of sound

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Decreases with pitch

Varies directly as its pitch

Varies inversely as its pitch

Depends upon the overtones present there

The SI unit of equivalent dose is

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Seivert

Gray

Radian

Rem

Under which of the following conditions current in a circuit is wattles.

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When inductance in the circuit is zero

When resistance in the circuit is zero

When current is alternating

When resistance and inductance both are zero

The combined effect of resistance and reactance's in A.C. circuit is called.

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Resistance

Conductance

Choke

Impedance

The force applied on unit area of a body to produce any change in shape volume or length is known as.

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Strain

Stress

Tensile strain

Tensile stress

Which is the thick circular structure in teh eye containing an aperture with variable diameter It controls the amount of light reaching the retina.

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Retina

Iris

Pupil

Cornea

If the earth stopped rotating the weight of the object at the equator would.

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Be greater

Be same as before

Be less

Very with altitude

In a projectile motion, the horizontal range depends upon.

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Initial velocity

Velocity at the highest position

angel of projection

Vertical component of velocity

Conductance is the reciprocal of

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Inductance

Capacitance

Resistance

Admittance

The decimal equivalent of 1111 is

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5

10

15

120

who gave the law of equipartition.

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Maxwell

Carnot

Claussius

Boltzmann

The corss product of two vectors is zero when they

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Are parallel to each other

Are perpendicular to each other

Are at an angle of 120 ^o

Both are equal

An electric current in conductors is due to the flow of.

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Positive ion

Negative ion

Positive charges

Free electrons

In an isochoric process.

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Volume changes

Pressure changes

Temperature changes

Volume remains constant

Absolute P.E. of a body can be calculated

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At centre of the earth

Below centre of the earth

From surface of the earth

Below surface of the earth

A well known example of an intrinsic semi conductors is.

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Germanium

Phosphorus

Cobalt

Aluminium

Which of the following is an example of irreversible process.

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Melting of ice

Work done against friction

Pettier heating and cooling

All isothermal and adiabatic changes

What is the degree of magnetization of a material.

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Susceptibility

Ablitity

Retentivity

Capacity

In the equation P = IV cos Theta Cos theta is known as

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Phase angle

Liming angle

Phase

Power factor

Wave length of a LASER can be sued as a standard of.

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Angle

Time

Length

Temperature

When the lift is moving upward with an acceleration then weight of the object will be.

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w = ma

w - ma

w

2 w

X-rays travels ins straight line with velocity

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Less than light

Greater than light

Equal to light

Equal to sound

In planetary motion

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Angular speed remains constant

Angular momentum remains constant

Linear speed remains constant

Linear momentum remains constant

Why choke coil is used in an AC circuit.

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To decrease D.C.

To increases A.C.

To decreases A.C

To increase D.C

A perfect back body

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Is a perfect absorber of all radiations

Is a perfect reflector of all radiations

Is a perfect reflector of visible lights radiations

Is a brownish object

Intensity of the dark bands in interference pattern becomes zero when two waves.

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Of light are monochromatic

Are of the same frequency

Are of the same amplitude

Travel in opposite direction

Polarized sunglasses decrease glare on a sunny day because they

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Completely absorb light

Block a portion of light

Have a special colour

refract light

In CE amplifier phased reversal occurs when the output voltage is taken between

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Base and collector

Base and emitter

Collector and emitter

None of the terminals

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