Question # 1

Application of wave like nature of particle is

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Photodiode

Optical microscope

Electron microscope

Compound microscope

The principle regarding the dual nature of light was first discovered by

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Compton

J.J.Thomson

De-Broglie

Heisenberg

Gamma radiations are emitted due to:

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De-excitation of atom

De-excitation of nucleus

Excitation of atom

Excitation of nucleus

Production of x rays is reverse process of

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Photo electric effect

Compton effect

An nihilation

Pair production

Electric intensity due to an infinite sheet of charge is:

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∂/2ε_∘

∂/rε_∘

∂/r2ε_∘

none of these

A° is the unit of:

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Energy

Length

Nuclear energy

Work

Improper bisting of a transistor circiut produces:

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Heavy loading of emitter current

Distortion in the output output signal

Excessive heat at collector terminal

Faculty location of load line

If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:

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10.2 eV

0 eV

3.4 eV

6.8 eV

A block body is an ideal:

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Absorber

Radiator

Both a & b

None of above

In metal detector, we use.

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L-C circuit

R-L circuit

R-C circuit

RLC series circuit

Electron volt is unit of:

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Chemical energy

Potential energy

Nuclear energy

heat energy

Vrms =

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0.7V_∘

0.07V_∘

0.007V_∘

0.75V_∘

An electron enters the magnetic field at right angle from left, B is into paper. The electron will be deflected.

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upward

To ward right

Down ward

Toward left

Terminal potential difference is greater than emf of the cell when

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Circuit is open

Circuit is closed

small battery is charged by bigger battery

None of these

The jerks in D.C. motor are created by the use of.

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Armature

Commutators

Split rings

Source of emf

The unit of conductivity is:

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Ohm^-3m^-1

Ohm m^-1

Both a and b

Ohm m^-1

Radio frequency choke is

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Iron cored

Air Cored

Air as well as iron cored

None of these

An in cudutor may store energy in

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Its magnetic field

Its coil

Its electric field

A neighboring circuit

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