Question # 1

Density is defined as:

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Mass per volume

Volume per mass

Mass x volume

Mass per length

The principle of superposition states that

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The total displacement due to several waves is the sum of the displacement due to those waves acting individually

Two stationary waves superimpose to give two progressive waves

A diffraction pattern consists of many interference patterns superimposed on one another

Two progressive waves superimpose to give a stationary wave

At what temperature the adiabatic change is equivalent to the isothermal change?

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Zero degree Celsius

Zero Kelvin

Critical temperature

Above critical temperature

Sound waves in air always

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Longitudinal

Transverse

Stationary

Electromagnetic

The wave form of S.H.M will be

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square wave

sine wave

rectified wave

saw-tooth wave

The graphical representation of ohm's law is

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hyperbola

straight line

ellipse

parabola

When the droplet moves with terminal velocity in a fluid, the net force acting on the droplet is:

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F_D-mg

Zero

mg-F_D

None of these

The photoelectric effect, the maximum energy of photoelectrons depends on the

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particular metal surface

frequency of incident light

both of them

none of them

The first series which was identified in the spectrum of hydrogen is called:

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Lyman series

Balmer series

Paschen series

Brackett series

Pfund series

From sand, we get a material used for construction of computer chips. That material is called:

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Germanium

Silicon

Copper

Lead

The phenomenon of generation of induced emf is called

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Electrostatic induction

Magnetic induction

Electromagnetic induction

Electric induction

Both (A) and (D)

In which of the optical fibres, the propagation of light signal is through continuous refraction?

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multi-mode step index fibre

multi-mode graded index fibre

both of them

none of them

The dimensions of co-efficient of viscosity are

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[ML^-1T^-1]

[ML^-2T^-1]

[ML²T^-3]

[ML³T^-1]

A material having high refractive index has

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Low density

High density

Zero density

None of these

The maximum and minimum magnitudes of the resultant of two given vectors are 17 units and 7 units respectively.If these two vectors are at right angles to each other.the magnitude of their resultant is

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14

16

18

13

A microscope has an objective lens of 10 mm focal length and an eye piece of 25.0 mm focal length what is the distance between the lenses

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≈ 200 mm

≈ 210 mm

≈ 213 mm

≈ 233 mm

In terms of energy bands, semiconductors are those materials which at room temperature have conduction band

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Partially filled

Full filled

Slightly filled

None of these

When the left is moving upwards with an acceleration 'a' then

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T - W = ma

W - T = ma

T = W

None of these

According to the relation for constructive destructive interference, the point of contact has zero thickness of air so it should have

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No interference

Conductive interference

Destructive interference

None of these

A bar of length L, cross-section A and Young's modulus Y, is pulled by a force F from both ends so as to produce an elongation x. Then:

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x∝1/L

x∝A

x∝1/A

x∝Y

The distance between the two mirrors can be varied by

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Moving glass plate

Movable mirror

Compensator plate

None of these

A polaroid is:

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An adjustable shutter

A device used to analyze polarized light

A device used in polarimeter

A light filter

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