Question # 1

Radius of first orbit of an atom is r1= 0.053 nm, Radius of second orbit r2 will be.

Choose an answer

0.106 nm

0.212 nm

0.053 nm

0.53 x 10^-10 nm

An atom can reside in excited state for

Choose an answer

10^-8 second

One second

10^-10 second

More than one second

Radius of first Bohr's orbit is.

Choose an answer

0.053 nm

0.053 mm

0.053 micro meter

0.053 m

The rest mass x ray photon is

Choose an answer

Infinite

Zero

1.67 X^-17 kg

All of the above

Reflecting mirrors in laser is used to

Choose an answer

Further stimulation

For producing more energetic lasers

Both (a) and (b)

None of these

Laser is a beam of light which is

Choose an answer

Monochromatic

Coherent

Unidirectional

All of these

If electron jumps from second orbit to first orbit in hydrogen atom it emits photon of.

Choose an answer

3.40 eV

10.20 eV

13.6 eV

3.8 eV

The energy of 4th Orbit in hydrogen atom is.

Choose an answer

-2.51 eV

-3.50 eV

-13.60 eV

-0.85 eV

The process by which lesser beam can be used to generate 3-dimensional images of objects is called

Choose an answer

Holography

Geo graphy

Tomography

Radio graphy

Which series lies in the ultraviolet region.

Choose an answer

Balmer series

Bracket series

Ptund series

Lyman series

Boher proposed his atomic model in:

Choose an answer

1910

1911

1912

1913

If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:

Choose an answer

10.2 eV

0 eV

3.4 eV

6.8 eV

For Holography we use

Choose an answer

X ray

Laser

gama rays

Beta rays

The series in infrared region is:

Choose an answer

Paschen series

Bracket series

Pfund series

All of above

Black Body radiation spectrum is an example of:

Choose an answer

Atomic spectra

Line spectra

Continuous spectra

None of above

In the Bohr's model of the hydrogen atom, the lowest orbit corresponds to:

Choose an answer

Infinite energy

Maximum energy

Minimum energy

Zero energy

Laser can be made by creating.

Choose an answer

Meta stable

Population inversion

Excited state

All of these

Paschen series lies in the

Choose an answer

Far ultraviolet region

Visible region

Ultraviolet region

Inferred region

More Classes

Other Links

Ics Part 2 Physics Chapter 9 Test Online 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