Question # 1

The decay process in which an unstable nucleus splits into two fragments of comparable mass is known as.

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Nuclear fission

nuclear fusion

Radioactivity

Carbon dating

Image formed by a camera is

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Real, inverted, and diminished

Virtual, upright and diminished

Virtual, upright and magnified

Real, inverted and magnified

Who suggested that energy is radiated or absorbed in discrete packers called quanta.

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Max. Planck

Stefan

Lummer

Boltzmann

Which one of the following instruments has the maximum resistance.

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Ammeter

Voltmeter

Micro ammeter

Milli ammeter

What is a measure of the total energy of a thermodynamics system.

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Entropy

Enthalpy

Randomness

Chaos theory

Which quantity has dimensions different from the others.

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Energy per unit volume

Force per unit area

Angular momentum per unit mass

Pressure

Plane polarized light can be produced by

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Reflection

Refraction

Scattering of light

All of these

When a charged rod is brought near bits of dry cork dust The dust will.

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Cling firmly to rod

Be replied from the rod

Attract itself to the rod a first and then fly off

Be repelled at first and then be drawn to the rod

The direction of induced e.m.f in a circuit is in accordance with conservation of.

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Mass

Charge

Momentum

Energy

In a n-type material there is an excess of.

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Free electrons

Holes

Quarks

Measons

The best shield against Gama rays would be of

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Heavy water

Aluminium

Iron

Lead

Which we double the voltage in a simple electric circuit, we double the

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Current

Power

Resistance

Both a and b

In simple harmonic motion we have the conservation of.

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K.E.

P.E

Total energy

Electrical energy

An astronaut in an earth satellite will observe the sky as

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Light blue

Deep blue

White

Black

Which of the given geometries will result in the largest convection consfficient.

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Vertical plate

Diagonal plate

horizontal plate facing upwards

Horizontal plate facing downwards

Surface tension of a liquid may be defined as

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Heat energy per unit area

P.E. per unit area

surface energy per unit area

K.E. per unit area

If temperature of the sink is decreased the efficiency of a Carnot engine

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Increases

Decreases

Remains constant

First increases and thend ecreases

The concept of entropy was introduced by

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Saadi Carnot

Boyle

Charles

Rudolph Celsius

The energy supplied in charging a capacitor resides after the charging in.

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The magnetic field

The electric field

the battery

The moving conduction charges

Positive electric charge is the type of charge found on a rod which has been rubbed with silk and which is made of.

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rubber

Glass

Steel

Cork

a spectrometer is used to study

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Spectrum

Waveform

Interference

Diffraction

An instrument which can float in the liquid to be tested and by means of which the specific gravity of the liquid may be determined is.

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Hydrometer

Barometer

Siphon

Lactometer

Mosley's law establishes the x rays fluorescence's of target element with its.

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Atomic weight

Atomic number

Density

Lattice constant

Induced current in a circuit depends upon

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The speed with which the conductor moves in the magnetic field

Resistance of the loop

Direction of the loop

Shape of the loop

Which kind of motion is exhibited by molecules of monoatomic gas.

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Rotatory

Vibratory

Translatory

Random

A ray of light from air into glass The angle of incidence is 30o if the refractive index of glass in 1.52 The angle of refraction will be.

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16.7 ^o

19.3 ^o

29.6 ^o

39.3 ^o

The mass defect of Bohr's atomic model is

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Exclusion of nuclear motion

missing of classical and quantum theories

Failed to explain the fine structure of spectral line

All of the above

Bracket and plunk series of spectral lines lye in the

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Visible region

Ultraviolet region

Far infrared region

Infrared region

The electrons behave as waves, because they can .

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Produce ions in gases

Diffracted by a crystal

Be deflected by electric fields

Be deflected by magnetic fields

A frictionless heat engine can be 100% efficient only if its exhaust temperature is

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Equal to the input temperature

Less than the input temperature

0 ^oC

0 K

When the velocity of body is doubled which one is doubled too.

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K.E.

P.E

Momentum

Acceleration

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