Question # 1

A small and a large rain drops are falling thgouth all.

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Large drop falls faster

Both move with same velocity

Small drop falls faster

Small drop does not fall

The output of a generator which uses a split ring commutator is.

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sinusoidal A.C. wave

Pulsating D.C. wave

Constant D.C Voltage

Linerly increasing voltage.

Lenz's presented his law is

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1826

1829

1834

1839

The force exerted by two charged bodies on another obeys Coulomb's law provided that

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Both bodies are in the same medium

the charges are not too great

On body does not lie inside the other

The linear dimensions of the body are very much less than the distance between the bodies.

When the lift is moving upward with an acceleration then weight of the object will be.

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w = ma

w - ma

w

2 w

An instrument used to find the direction of the earths magnetic field is known as.

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Magnetometer

Electroscope

Cyclotron

Particle accelerator

A disturbance that travels through space and time usually accompanied by energy transfer is called.

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sound

Wave

Echo

Frequency

The sum of the positive and negative peak values is known as.

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Peak value

Average value

Instantaneous value

Peak to peak value

When a body is lifted through a height 'h' the work done on the body appears in the form of.

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K.E

P.E

Heat

Density

The amplitude of a vibrating body at resonance place in vacuum is.

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zero

Maximum

Minimum

Infinite

The main advantage of a grating over Young's apparatus is the

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Sharpness of the bright lines

Absence of dark fringes

Absence of bright fringes

Greater deviation of light

On which parameter the time required to charge a capacitor depends upon.

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magnitude of charge

Applied potential difference

Capacitances

Time constant

The magnitude of the instantaneous velocity is called the.

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_Displacement

Speed

Acceleration

Length

A substance which has empty conduction band.

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Insulator

Conductor

Semi conductor

super conductor

Which one of the following quantities is conserved in a nuclear reactor.

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Energy only

Mass only

Momentum only

Mass energy and momentum

The deflection image due to oblique centric rays failing on the lens is called.

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Coma

Spherical aberration

Astigmatism

Curvature of image field

The angular momentum of a body about a fixed point is conserved if its velocity

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Decreases

Increases

Remain the same

Becomes zero

When light of particular frequency is allowed to fall upon a metal surface electrons are emitted from a these emitted electrons are called.

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Photons

Holes

Quants

Photo electrons

A bi convex lens of a material of refractive index 1.5 has the radius of curvature of each side equal to 50 cm the power of the lens will be.

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0.5 dipotre

1.0 dioptre

1.5 diopter

2.0dioptre

Who proposed the temperature equalization mechanism of a body by thermal radiations with that of its surroundings.

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Pierre Provost

Robert Brown

Albert Einstein

Issac Newton

Which one of the following is a convenient energy unit to express the energy of sub atomic particles.

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Joule

electron volt

Watt

Curie

A man in an elevator descending with an acceleration will conclude that his weight has

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Increased

Decreased

Constant value

Zero value

The sound velocity in moist air as compared to dry air will be

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More

Less

Same

zero

When an obliquely falling ray of light enters from one medium ot another it changes its path this phenomenon is called.

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Reflection

Refraction

Diffusion

Diffraction

The resistance of a coil changes directly with

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The current of A.C.

The frequency of A.C

The inductance

Both B and C

The potential due to which an electron is lifted from gerund state to excited state is.

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Potential gradient

excitation potential

Ionization potential

Potential difference

Inductance are measured in

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Coulombs

Volts

Henrys

Farads

Out of the following pairs, which one does not have te same dimensions.

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Force and weight

Pressure and stress

Energy and work

Momentum and torque

The phenomenon of Compton's effect process that right has

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Wave nature

Particle nature

Dual nature

Corpuscular nature

Thermodynamics deals with

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Isolated systems

The interactions among various parts of the system

The microscopic behavior of a system

The interactions between system and surrounding

An electric motor could be used as a

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Battery

Capacitor

Dynamic

Transofrmer

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