Question # 1

SI unit of wave length is:

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Kilometer

Metre

Centimetre

Hertz

Generally a temperature scale is established by

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one fixed point

two fixed point

three fixed point

four fixed point

When a wall is pushed by a person very strongly, he has done:

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Maximum work

Zero work

Positive work

Negative work

The electric field will be uniform

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Near a positive point charge

Near a negative point charge

Between two oppositely charged parallel metal plates

None of above

In case of streamed lined flow of liquid, the loss of energy is

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Maximum

Minimum

Infinite

equal to what is in turbulent flow

Lyman series in the spectrum of hydrogen exists in the :

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Infra-red region

Visible region

Ultraviolet region

Both(A) and (B)

None of these

The results of spectra obtained by Blamer were expressed in 1896 by

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Bohr

Rydberg

Planck

Rutherford

Coulomb

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

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200 J

100 J

1000 J

400 J

A railway engine (mass 10⁴kg) is moving with a speed of 73 km/h. The force which should be applied to bring it to rest over a distance of 20 m is

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3,600 N

7,200 N

10,000 N

100,000 N

When a water droplet falling freely through air, the drag force on water droplet increases with th

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decrease in speed

increase in speed

pressure

none of them

Centripetal force performs:

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Maximum work

Negative work

Positive work

None of these

The fringes produced in Young's double slit experiment will be wider if the distance between the two slits is

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small

large

zero

very large

A unit set is the smallest basic structure which is:

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One dimensional

Two dimensional

Three dimensional

Four dimensional

None of these

One day is equal to

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5 × 10⁷ sec

6.6 × 10⁴ sec

9.3 × 10³ sec

None of these

A fiber of 50μm diameter capable of carrying white light at ______ distances is called ______ index fiber

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Large, multi-mode step

Small, multi-mode step

Small, multi-mode graded

Large, single mode step

All possible process/processes to get plane polarized light

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Reflection from different surfaces

Refraction through crystals

Scattering by small particles

All of these

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

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Atomic Physics

Plasma Physics

Molecular Physics

Solid state Physics

A diode as a rectifier converts:

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A)c into D)c

D)c into A)c

Varying D)c current into constant D)c current

High voltage into low voltage and vice-versa

When 400.1 is added to 20.54 we get

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420

420.65

420.1

420.6

A diode characteristics curve is a graph plotted between;

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Current and time

Voltage and time

Voltage and current

Forward voltage and reverse current

When two balls collide then after collision, they rebound with velocities less than the velocities before the impact, because a portion of K.E is lost in the form of

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friction

heat energy

sound energy

all of them

Which of the following radiation will be focused farthest from a convex lens

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X - rays

γ - rays

Microwaves

β - rays

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