1800-150-456-789
FlagBACK
Flag Modern Physics> To produce characteristic X – rays using ...
question mark

To produce characteristic X – rays using a Tungsten target in an X-ray generator, the accelerating voltage should be greater than . . . . . . . . . . . . . . . . . . . . volts and the energy of the characteristic radiation is . . . . . . . . eV.

Shane Macguire , 10 Years ago
Grade upto college level
anser 1 Answers
Deepak Patra

Last Activity: 10 Years ago

For minimum accelerating voltage, the electron should jump from n = 2 to n = 1 level.
For characteristic X – rays
1 / λ = Rα (Z – 1 )2 [1 – 1 / n2] = = E / hc
∴ E1 / hc = Rα (Z - 1)2 [ 1 – 1 / 22] . . . . .(i)
The binding energy of innermost electron = 40 ke V
∴ Ionisation potential of tungsten = 40 k V = 40 x 103 V
⇒ E2 / E2 = [1 – 1/22] / [1 – 1/ ∞2]
⇒ E1 = ¾ E2 = ¾ x 40, 000 eV = 30, 000 eV
∴ Minimum accelerating voltage,
Vmin­ = E1 / e = 30, 000 V

star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Other Related Questions on modern physics

question mark
A particle is projected in vertical plane such that after 5 seconds its velocity becomes horizontal. The maximum height attained by the projectile from point of projection is n3 m. The value of n is _______. (g = 10 m/s2)
modern physics
1 Answer Available

Last Activity: 2 Years ago

question mark
Two particles approach each other from very large distance as shown, . if the least separation between the particles is b, what is the speed of M in center of mass frame when particles are closest? (gravity negligible)
modern physics
0 Answer Available

Last Activity: 2 Years ago

question mark
Can the sum of two equal vectors be equal to either vector
 
modern physics
0 Answer Available

Last Activity: 3 Years ago

question mark
A nucleus X184 at rest emitt alpha particle With kinetic energy 9.0MeV. The product Nucleus is Y. The values of Binding energy per nucleon of alpha particle & Y differ by 1.5MeV. The values of Binding energy per nucleon of X & Y differ by (n÷230) MeV, then n is
modern physics
0 Answer Available

Last Activity: 3 Years ago

question mark
SUBJECT: PROBLEM BASED ON LINE DETECTION.
Query: How to apply all the filters for line detection on the following piece of image (provided below)? Explain its Observations to comment on its results.
modern physics
0 Answer Available

Last Activity: 3 Years ago