Question # 1

a spectrometer is used to study

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Spectrum

Waveform

Interference

Diffraction

Soap film in sunlight appears coloured due to

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Dispersion of light

Diffraction of light

Scattering of light

Interference of light

On which principle the induction coil works on.

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Self induction

Ampere's rule

Mutual induction

Gauss's law

What is the total entropy change during an reversible cycle.

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Unity

Infinite

Zero

Cannot be detected

Two forces each of 10 N magnitude act on a body It the forces are inclined at 30 ^o and 60 ^o with x-axis, then the x-component of their resultant is.

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10 N

1.366 N

13.66 N

1.35 .6 N

The Lenz's law is also a statement of the law of conservation of.

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Energy

Mass

Momentum

Torque

Pure silicon has valence electrons

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1

2

3

4

Which two terminal passive electronic component implements electrical resistance as a circuit element.

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Capacitor

Inductor

Resistor

Transformer

Potential of earth's surface is.

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Negative

Positive

Zero

Infinite

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

An object is -14 cm in front of a convex mirror The image 5.8 cm behind the mirror. What is the focal length of the mirror.

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-4.1 cm

-8.2 cm

- 9.9 cm

-20 cm

A pendulum vibrates with a time period of 1 s which range of sound is produced by it

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Audible

Infrasonic

Ultrasonci

Super sonic

In the case of forced oscillations frequency of oscillation is.

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The natural damped frequency

The natural undamped frequency

The frequency of the external periodic force

Some other frequency

Simple harmonic motion may be assumed as a projectio of uniform circular motion along a

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Diagonal

hypotenuse

Diameter

Radius

The buoyancy depends upon the

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Depth to which the body is immersed

Shape of the body

Mass of the body

Mass of the liquid displaced

Since selenium becomes conductor in light so it is.

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Photoconductor

Photocell

Thermistor

Photodiode

The kinetic molecular model of matter describe matter an being made up of molecules in continuous.

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Vibratory motion

Random motion

rotatory motion

Linear motion

Choose the one which acts as single inverter.

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Common emitter

common collector

Common base

Diode

Which quantity remains fixed in isobars.

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Mass number

Atomic number

Number of neutrons

Number of protons

The closed end of an organ pipe having longitudinal stationary waves in it behaves as

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Antinode

Source of waves

Node

Antinode

The force that moves a rocket or a plane forward is called.

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Lift

drag

Thrust

Turbulence

Critical mass is the minimum mass needed for

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Fusion

H-Bomb

Chain reaction

Binding energy

In order of a cyclic heat engine operating between two heat reservoirs to be as efficient as a Carnot engine. It must be.

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A gas engine

Adiabatic

Reversible

A refrigerator

The centre of gravity of an irregular shaped object lies at

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The intersection of diagonals

The intersection of medians

Its centre

The axis of rotation

Dioptre is the term used for describing the

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Intensity of light

Density of air

Power of light

Refractive index

Light rays after passing through is convex lens.

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Bend away from principal axis

Bend towards participial axis

Remain unriveted

Travel parallel to the principal axis

If a conductor sun infirmly stretched so that its length is increased in timed, then its resistance becomes.

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n times the original resistance

1/n times the original resistance

n2 times the original resistance

n3 times the original resistance

The exitance of more than one distinct state with the same energy is called.

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Exigency

Degeneracy

Normally

Emergency

The converse of pair production is

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Annihilation of matter

Materialization

Compton effect

Photo electric effect

A force of 100 N acts on body of mass 5 kg for 10 s. The velocity of the body will be.

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2 ms -1

20 m s-1

200 ms-1

2.000 m s-1

Two convex lens focal length 'f' use din combination become telescope. When the distance between them is.

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1

4f

2f

f/2

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