Example 1 · difficulty 3/5
The ionisation potential of the hydrogen-like Li²⁺ ion (ground state) is:
- A. 13.6 V
- B. 122.4 V
- C. 54.4 V
- D. 40.8 V
2018 source guide · Physics
NEET 2018 Physics Modern Physics Questions
Use this page to connect the official 2018 paper with current Physics practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.
What to master
photoelectric effect, atomic models, spectra, nuclei and radioactivity.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 4/5
For the hydrogen spectrum, the ratio of the shortest wavelength (series limit) of the Balmer series to that of the Lyman series is:
- A. 1 : 4
- B. 2 : 1
- C. 1 : 1
- D. 4 : 1
Example 3 · difficulty 1/5
In a photoelectric experiment, monochromatic light of frequency greater than the threshold frequency falls on a metal plate. If the intensity of this light is doubled while its frequency is kept unchanged, then:
- A. the saturation photocurrent doubles but the stopping potential remains unchanged
- B. the stopping potential doubles but the saturation photocurrent remains unchanged
- C. both the saturation photocurrent and the stopping potential double
- D. the saturation photocurrent doubles but the stopping potential is halved
The evidence-first practice loop
- 1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
- 2. Attempt closed-bookExpose the concept or execution gap before rereading.
- 3. Repair and returnClassify the miss and re-practice after a delay.
Canonical chapter practice
Frequently asked questions
Are these official NEET 2018 Physics Modern Physics PYQs?
No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.
How should I use the NEET 2018 paper?
Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.