Physics · Atomic Physics
JEE Advanced 2020 — Paper 2 — Question 8
In an X-ray tube, electrons emitted from a filament (cathode) carrying current I hit a target (anode) at a distance d from the cathode. The target is kept at a potential V higher than the cathode resulting in emission of continuous and characteristic X-rays. If the filament current I is decreased to , the potential difference is increased to , and the separation distance is reduced to , then
- Option A:Correct
the cut-off wavelength will reduce to half, and the wavelengths of the characteristic X -rays will remain the same
- Option B:
the cut-off wavelength as well as the wavelengths of the characteristic X-rays will remain the same
- Option C:Correct
the cut-off wavelength will reduce to half, and the intensities of all the X -rays will decrease
- Option D:
the cut-off wavelength will become two times larger, and the intensity of all the X-rays will decrease
Answer: A, C
Step-by-step solution
, current Intensity
Answer key and solution verified before publishing.
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- Exam
- JEE Advanced 2020
- Paper
- Paper 2
- Subject
- Physics
- Chapter
- Atomic Physics
- Topic
- X-Rays