Atomic Spectra Set 1 - ilmijazeera

Results

#1. Characteristic X-rays are the X-rays which have

High energy photons

Specific wavelengths

Specific frequencies

All of these

#2. In Laser a Meta-stable state is

An excite state

In which an electron is usually stable

In which an electron reside 10 sec

None of these

#3. X-rays was discovered by

Becquerel

Mari-curie

Roentgen

Lane

#4. The value of Plank's constant is

6.63* 10 ^ -36 J.sec

6.63* 10 ^ -36 J/sec

6.63* 10 ^ -36 sec/J

None

#5. Laser is a device which can produce

Intense beam of light

Coherent light

Monochromatic light

All

#6. When magnetic field is applied in the path X- rays, they will be moving in

Straight line

Circular path

Parabolic path

None

#7. The Meta-stable state of Helium and Neon is

Different

Identical

Nearly identical

None of these

#8. Emission of electrons by metal on heating is called

Secondary emission

Field effect

Photoelectric emission

Thermionic emission

#9. The numerical value of ground state energy for H-atom in electron volt is:

-10

13.6

-13.6

#10. The quantized energy of first Bohr orbit of hydrogen atom is

13.04 eV

13.6 V

13.64V

13.5 eV

Finish