Question # 1

Who discovered the exclusion principle which states that no two electrons can occupy the same quantum mechanical state in a given system.

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Neils Bohr

Issac Newton

Wolfgang Pauli

Max Planck

In order to reduce uncertainty in momentum one must use light of.

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Short wavelength

Large wavelength

Wavelength of intermediate value

Wavelength of any value

Which analysis is employed to convert a complex sound into notes.

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Fourier theorem

Milleman theorem

Lissajoes theorem

Demorgan's law

Which one of the following spectra series is in the ultraviolet region.

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Lyman series

Paschen series

Brackett series

Plund series

The best shield against Gama rays would be of

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Heavy water

Aluminium

Iron

Lead

The horizontal distance of a projectile from the point of launch to the point of impacts is called.

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Height of projectile

Range of projectile

Path of projectile

Angle of projectile

If the transformer turns ratio is 2 and the impedance eof primary coil is 250 Ohms then the impedance secondary coil will be.

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125 Ohms

250 Ohms

500 Ohms

1000 Ohms

Which of the following parameters is irrelevant for a fuse wire.

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Its radius

Current flowing through it.

Its specific resistance

Its length

The study of atomic structure of crystals by x rays was initiated by.

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Mosely

Young

Huygen

Bragg

The SI unit of magnetic flux is

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gauss

Maxwell

Oersted

Water

A sound wave is an example of

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Transverse wave

longitudinal waves

Hair wave

Stationary wave

In a parallel resonant circuit, at resonance

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Current is maximum

Voltage is maximum

Impedance is minimum

Impedance is zero

The SI unit of solid angle is

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Degree

Radian

Steradian

Candala

Induced fission result from the absorption of

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electron

Proton

Nucleon

Neutron

An ice making machine extracts energy at the rate of 500 W The specific latent heat of fusion of ice is 300 kj kg-1. How long does it take to freeze 2 kg of water at 0 oC.

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120 s

150 s

1200 s

1500 s

The velocity of light was determined accurately by

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Newton

Huygen

Michelson

Young

The weight of a man in an elevator moving down with an accelerating of 9.8 m s-2 will be come

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Half

Zero

9.8 N

Double

Resonance phenomenon in a vibrating body

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May increase the amplitude

May decrease the amplitude

May not affected the amplitude

All of the above

Which temperature is required for the fusion of two nuclides.

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10⁶ K

10⁷K

10⁸K

10 ⁹ K

On reflection of light from a source there occurs a change in

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Wavelength

Velocity

Period

Frequency

The efficiency of Carnot engine is

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Less than one

Zero

Greeter than one

Infinite

Which statement about convection is correct.

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Brownian motion is a form of convection

Convection occurs only in gas

Convection results from a density change

Evaporation is a form of convection

When a monochromatic wave enters from one medium into another the property that remains unchanged.

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Amplitude

Velocity

Frequency

Nature of the wave

The resolving power of an instrument increases as the wavelength of light used decreases, the magnifying power will

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Remain the same

Increases

Decreases

Have no relation between the two

The escape velocity

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Increases with the increase of the mass of the body

Depends on the type of body used

Is independent of mass of the body

Decreases with the increases of the mass of the body

The average energy released per fission of U is about

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200 eV

2 keV

2 MeV

200 MeV

Air bubble in water shines because of

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Reflection

Refraction

Diffraction

Total internal reflection

The equal and opposite forces acting on a body form

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Angular momentum

Linear momentum

Torque

Couple

A wave that consists of oscillations occurring perpendicular to the direction of energy transfer is called.

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Transvers wave

Longitudinal wave

Stationary wave

Shock wave

In a simple D.C. motor the direction of current in the motor is reversed every half revolution to keep the motor turning in the same direction which part of the motor does this.

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Brushes

Coil

Commutator

Poles

The erecting lens of a telescope produces

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A shorter instrument

wider field of view

A larger image

A sharp image

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