Question # 1

The value of the metastable state for Neon is

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20.66eV

20.61eV

19.23eV

18.70eV

The holes created in the L and M shells are occupied by transitions of:

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Electrons from lower states

Electrons from higher state

Positrons from higher states

Electrons from K shell

Both (A) and (B)

The results of spectra obtained by Blamer were expressed in 1896 by

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Bohr

Rydberg

Planck

Rutherford

Coulomb

The photocopying process is called:

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Geography

Sonography

Xerography

Zerography

None of these

In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them

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Small

Greater

Equal

Sometimes

Graph of Black body radiation is example of

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Band spectra

Continuo's spectra

Line spectra

All

CT scanning is the abbreviated name of

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Computed Technology

Computed Technique

Computed Technology

Computerized Technique

The He-Ne laser discharge tube is filled with:

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85% He

15% He

50% He

60% He

85% Ne

Tick the series which lie/s in. the infra-red region.

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Pfund series

Brackett series

Paschen series

All of these

None of these

Ultraviolet region lies in ______ series

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Layman

Balmer

P fund

B racket

Selenium is:

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An insulator

A conductor

Both A and B

Excellent conductor

None of these

The inkjet printer eject a thin stream of:

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Water

Oil

Ink

Any above

None of these

The results of spectra obtained by Balmer were expressed in 1896 by:

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Bohr

Rydberg

Planck

Rutherford

Coulomb

In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:

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Short wavelength

Large wavelength

Very large wavelenth

Low frequency

Both (B) and (C)

The first series which was identified in the spectrum of hydrogen is called:

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Lyman series

Balmer series

Paschen series

Brackett series

Pfund series

The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:

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Ultra red region

Visible region

Ultraviolet region

Any of these

None of these

Gaussian surface is always:

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Rectangular

Spherical

Cylinder

Box shape

Any of these

The natural arrangement of colours in the spectrum of white light spectrum is

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VIBGYOR

ROYBGIV

ROYBIGV

BIGROYV

None of these

Photons must have energy equal to

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ev

En

hf

None of these

The lasing or active medium in He-Ne laser discharge tube is:

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Nitrogen

Helium

Hydrogen

Neon

None of these

The range of wavelengths of colurs in the visible colours is

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140 nm to 456 nm

10 nm to 56 nm

410 nm to 656 nm

910 nm to 956 nm

None of these

X-ray are also known as

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Roentgen rays

Maxwell rays

Plank range

Einstein rays

The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is

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1.24 x 10^-10m

7.92 x 10^-20m

2.78 x 10^-14m

3.88 x 10^-11m

X-rays produced in a tube operating at 10⁵V. The speed of X-rays produced is

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3 x 10⁸m/s

3.1 x 10⁸m/s

2.8 x 10⁸m/s

1.88 x 10⁸m/s

The shell closer to the nucleus is called:

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N shell

L shell

K shell

M shell

O shell

We can excite an atom by

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Bombardment of particles

Radiating photons

Providing potential difference

All answer are true

Lyman series in the spectrum of hydrogen exists in the :

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Infra-red region

Visible region

Ultraviolet region

Both(A) and (B)

None of these

An compared to solid matter, a crack or an air bubble allows:

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Great amount of X-rays to pass

Smallast amount of X-rays to pass

Very samall amount of X-rays to pass

Any of these

None of these

X-rays can penetrate in a solid matte through a distance of several:

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Kilo metres

Metres

Centimeters

A few angstroms

One micrometer

Tick the series which lies in the visible region:

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Lyman series

Balmer series

Paschen series

Brackett series

P fund series

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