Question # 1

CT scanning is the abbreviated name of

Choose an answer

Computed Technology

Computed Technique

Computed Technology

Computerized Technique

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

Choose an answer

Kilo metres

Metres

Centimeters

A few angstroms

One micrometer

Laser is a beam of:

Choose an answer

Visible light

Infra red light

Ultra violet light

Violet light only

yellow light only

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

Choose an answer

VIBGYOR

ROYBGIV

ROYBIGV

BIGROYV

None of these

X-ray are also known as

Choose an answer

Roentgen rays

Maxwell rays

Plank range

Einstein rays

The first shell near the neucles is

Choose an answer

L-shell

X-shell

N-shell

M-shell

Tick the series which lies in the visible region:

Choose an answer

Lyman series

Balmer series

Paschen series

Brackett series

P fund series

Photons must have energy equal to

Choose an answer

ev

En

hf

None of these

The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:

Choose an answer

one

two

three

four

five

The range of wavelengths of colurs in the visible colours is

Choose an answer

140 nm to 456 nm

10 nm to 56 nm

410 nm to 656 nm

910 nm to 956 nm

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

We can excite an atom by

Choose an answer

Bombardment of particles

Radiating photons

Providing potential difference

All answer are true

Ultraviolet region lies in ______ series

Choose an answer

Layman

Balmer

P fund

B racket

A metastable stae:

Choose an answer

Is an excited state

Is that in which excited electron is stable

Is that in which excited electron is usually unstable

Means a time interval of 10^-8second

Both (A) and (C)

The photocopying process is called:

Choose an answer

Geography

Sonography

Xerography

Zerography

None of these

More Classes

Other Links

Physics ECAT Pre Engineering Chapter 20 Atomic Spectra Physics 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