Question # 1

The numerical value of Compton wavelength is equal to

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3.43 x 10^-12 m

1.43 x 10^-12m

2.43 x 10^-12m

0.43 x 10^-12m

The temperature of core of nuclear reactor is:

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1100°C

1200°C

1300°C

1400°C

In according with Bohr's theory the K.E of the electron is equal to:

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ke²/2r

Ze²/r

Ze²/r²

Ze²/2r²

Nuclear fission chain reaction is controlled by using.

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Cadmium rods

Iron rods

Platinum rods

Steel rods

The average gap for Germanium at 0K is

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1.12 ev

0.02 ev

6.72 ev

7.2 ev

The series in infrared region is:

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Paschen series

Bracket series

Pfund series

All of above

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None of the above

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Specific resistance of a material depends upon.

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Length

Area

Temperature

Both A and B

One joule is equal to.

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1.6 x 10¹⁹ eV

1.6 x 10^-19 eV

6.25 x 10^-18 eV

6.25 x 10 ¹⁸ eV

The mass spectrum of naturally occurring neon, showing

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1 isotope

2 isotope

3 isotope

4 isotope

The number of lines per unit area passing perpendicular through an area is called

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Flux

Electric intensity

Both (a) , (b)

None of these

A capacitor is perfect in insulator for.

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Alternating current

Sparking current

Eddy current

Direct current

A dot represents the direction of magnetic field.

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Out of page

Into the page

Tangent to page

Parallels to page

A capacitor is perfectly insulator for:

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Direct current

Alternating current

Direct as well as alternating current

None of these

Electron volt is unit of:

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Chemical energy

Potential energy

Nuclear energy

heat energy

Laser is a device which can produce:

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Intense beam of light

Coherant beam of light

Monochromatic beam of light

All of the above

Cathode ray oscilloscope works by deflecting a beams

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Neutrons

Protons

Electrons

Positron

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