Question # 1

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

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Bohr

Rydberg

Planck

Rutherford

Coulomb

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

If the distance between two charges is doubled,the force between them will become:

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Double

Half

One third

One fourth

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

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Bohr

Rydberg

Planck

Rutherford

Coulomb

Ultraviolet region lies in ______ series

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Layman

Balmer

P fund

B racket

An electron of the hydrogen atom in the second orbit is called its:

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Ground state

Excited state

Ionized state

Any of these

None of these

CT scanning is the abbreviated name of

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Computed Technology

Computed Technique

Computed Technology

Computerized Technique

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

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

The inkjet printer eject a thin stream of:

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Water

Oil

Ink

Any above

None of these

In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is

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Helium

Neon

Both

None of these

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)

We can excite an atom by

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Bombardment of particles

Radiating photons

Providing potential difference

All answer are true

Selenium is:

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An insulator

A conductor

Both A and B

Excellent conductor

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

The shell closer to the nucleus is called:

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N shell

L shell

K shell

M shell

O shell

By CAT scans, we can detect the density difference of the order of:

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1%

20%

30%

50%

70%

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

The spectrum emitted from hydrogen filled discharge tube is:

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Line spectrum

Discrete spectrum

And spectrum

Absorption spectrum

Both (A) and (B)

Graph of Black body radiation is example of

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Band spectra

Continuo's spectra

Line spectra

All

Tick the series which lies in the visible region:

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Lyman series

Balmer series

Paschen series

Brackett series

P fund series

Gaussian surface is always:

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Rectangular

Spherical

Cylinder

Box shape

Any of these

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ECAT Pre General Science Physics Chapter 20 Atomic Spectra Online Test MCQs With Answers

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