Question # 1

The crystalline structure of NaCI is

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rectangular

hexagonal

tetrahedral

cubical

An important part of inkjet printer is:

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Toner

Drum

Deflection plates

Heated roles

None of these

Time period of simple pendulum is independent of

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length

mass

acceleration due to gravity

none of them

The critical temperature of mercury is

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1.18 K

4.2 K

3.72 K

7.2 K

The value of the plank's constant 'h' is given by

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1.6 x 10^-19J

1.67 x 10^-27Kg

6.63 x 10³⁴Js

6.63 x 10^-34Js

With age, least distance of distinct vision:

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Increases

Decreases

Is not affected

None is correct

In Bernoulli's theorem the relation between velocity and pressure is

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Inverse

Direct

None of the above

Both a and b

Referring to above figure, current in the coil P grows from zero to its maximum value

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At the instant the switch is closed

At the instant the switch is opened

When switch is kept open

All of above

Neither of above

Such an inductor coil which does not consume energy and is often employed for controlling a.c. without consumption of energy is called

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Choke

impedance

Semi-conductor

None

The electric flux is linked with a surface will be maximum when

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The surface is held parallel to the electric field

The surface is held perpendicular to the electric field

The surface makes an angle of 45° with the electric field

All of the above

In order to produce pair production, a photon must have a energy

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0.511 Me v

0.256 Me v

1.02 Me v

0.956 Me v

Who proposed that light energy form a luminous source travels in space by means of wave motion?

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Newton

Maxwell

Einstein

Huygen

The unit cell of the shape of match box is called

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Cubic

Tetragonal

Orthorhombic

Rhomboheral

For interference to occur, the light coming from the two slits should

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be monochromatic

come from the same source

have a constant path difference

all of them

Which of the material have largest value of young's modulus

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Copper

Diamond

Aluminum

Iron

By dimensional analysis, we can find

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Correctness of formula

Derivation of formula

Physical nature

All of these

As the droplet accelerates, the upward drag force on it

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Increases

Decreases

Suspended

None of these

The medium in which speed of light is the same in all directions is called

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non-homogeneous medium

homogeneous medium

both of them

empty medium

Work energy principle is the work done on the body is equal to

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Change in power

Change in K.E.

Change in acceleration

Change in angular velocity

Young's modulus for diamond is

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700

913

1100

1120

The property of light which makes light possible to be transmitted into inaccessible place is

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Interference

Diffraction

Polarization

None of these

If there were no intermolecular forces between gas molecules, the pressure due to a given sample a gas will be

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Increased

Decreased

Unchanged

None of these

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