Physics - Modern Physics Question with Solution | TestHub
PhysicsModern PhysicsX-raysMedium2 minQB
PhysicsMediummultiple choice
X-ray are produced in an X-ray tube by a target potential of 60 kV. The tube can have rubidium as well as tungsten as the target material. The X-ray energy levels for rubidium are 17.6 keV for the K-shell and 4.68 keV for the L shell. The X-ray energy levels for tungsten are 69.5 keV for the K shell and 11.3 keV for L shell.
Options:(select one or more)
Answer:
B, C, D
Solution:
depends only on , so (B) true, (A) false. K-ionisation needs for Rb but 69.5 kV for W, so K-series of Rb starts at a smaller voltage, (C) true. At 60 kV, 60 < 69.5 keV, so W K-series cannot be produced, (D) true.
Subject:PhysicsTopic:Modern PhysicsSubtopic:X-rays
⏱ 2mℹ️ Source: QB
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