Question # 1

The SI unit of magnetic induction Tesla is equal to

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N-1 Am

NA m2

NA-1n2

NA-1m-1

Net charge enclosed by Gaussian surface is:

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zero

maximum

depend on intensity

none of all

1 Henry =

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VSA^-1

VS^-1A^-1

V^-1SA

VSA^-2

The building blocks of protons and neutrons are called.

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Ions

Electrons

Positrons

quarks

The process by which lesser beam can be used to generate 3-dimensional images of objects is called

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Holography

Geo graphy

Tomography

Radio graphy

When charge particle enter perpendicular to magnetic field, the path followed by it is:

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A helix

A circle

Straight line

Ellipes

The AC system is preferred to DC system because:

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AC voltage can be easily changed in magnitude

DC motor angular velocity is affected badly

High voltage AC transmission is less efficient

Domestic appliance require AC voltage for their operation

The particles equal in mass but greater than proton are.

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Mesons

Baryons

Leptons

Hadrons

The curie temp for iron is about

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800^oC

740^oC

750^oC

650^oC

Which of the following basic force is able to provide an attraction between two neutrons:

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Electrostatic and nuclear b

Electrostatic and gravitational

Gravitational and strong nuclear

Only nuclear force

Pulsating output of full wave rectifier can be made smooth by using circuit called.

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Filter

Amplifier

Resistor

Transistor

An in cudutor may store energy in

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Its magnetic field

Its coil

Its electric field

A neighboring circuit

Transformer is used to change

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Electric power

Magnetic field

Alternating voltage

Phase of A.C.

Binding energy per nucleon is maximum for

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Platinum

Iron

Uranium

Lead

Radioactivity happen due to the disintegration of

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Nucleus

Mass

Electrons

Protons

The "toner" of photocopier is given:

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Positive charge

Negative charge

Remains neutral

All of above

Efficiency of transformer does not affected by

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Input voltage

Core of transformer

Insulation between sheet

Resistance of coils

The materialization of energy take place in the process of.

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Photo electric effect

Compton Effect

Pair production

Annihilationof matter

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