Question # 1

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

Choose an answer

VIBGYOR

ROYBGIV

ROYBIGV

BIGROYV

None of these

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

Choose an answer

1.24 x 10^-10m

7.92 x 10^-20m

2.78 x 10^-14m

3.88 x 10^-11m

The process of formation of spectrum is called:

Choose an answer

Interference

Spectroscopy

Dispersion

Reflection

Botha (A) and (D)

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

Choose an answer

Double

Half

One third

One fourth

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

Choose an answer

3 x 10⁸m/s

3.1 x 10⁸m/s

2.8 x 10⁸m/s

1.88 x 10⁸m/s

The He-Ne laser discharge tube is filled with:

Choose an answer

85% He

15% He

50% He

60% He

85% Ne

Balmer series was identified in:

Choose an answer

1685

1785

1885

1985

1585

The electric field lines start from:

Choose an answer

Positive charge

Negative charge

Either A and B

Neutron

An atom

Gaussian surface is always:

Choose an answer

Rectangular

Spherical

Cylinder

Box shape

Any of these

Ultraviolet region lies in ______ series

Choose an answer

Layman

Balmer

P fund

B racket

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

Choose an answer

Short wavelength

Large wavelength

Very large wavelenth

Low frequency

Both (B) and (C)

The spectrum emitted from hydrogen filled discharge tube is:

Choose an answer

Line spectrum

Discrete spectrum

And spectrum

Absorption spectrum

Both (A) and (B)

Spectrum represents the number of component colours present in certain light in terms of:

Choose an answer

Wavelength

Frequency

Energy

Both (A) and (B)

All of these

X-ray are also known as

Choose an answer

Roentgen rays

Maxwell rays

Plank range

Einstein rays

The life time of metastable state is equal to

Choose an answer

Life time of excited state

Greater than by excited state

Zero

Less than by excited state

The photocopying process is called:

Choose an answer

Geography

Sonography

Xerography

Zerography

None of these

The shell closer to the nucleus is called:

Choose an answer

N shell

L shell

K shell

M shell

O shell

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

Choose an answer

Helium

Neon

Both

None of these

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

Choose an answer

Pfund series

Brackett series

Paschen series

All of these

None of these

Lyman series in the spectrum of hydrogen exists in the :

Choose an answer

Infra-red region

Visible region

Ultraviolet region

Both(A) and (B)

None of these

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

Choose an answer

Nitrogen

Helium

Hydrogen

Neon

None of these

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

Choose an answer

1%

20%

30%

50%

70%

More Classes

Other Links

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

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer