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Modern Physics Lab (B.Sc Physics)

Experiments on Planck's constant, e by m, photoelectric effect, Hall effect and spectral lines.

6 महीनेअवधि 4Chapters18टॉपिक
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सिलेबस · पाठ्यक्रम

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01Planck's Constant and Photoelectric Effect 5 टॉपिक
  1. Planck's constant using LEDs of different colours
  2. Knee (threshold) voltage of an LED
  3. Photoelectric effect: stopping potential versus frequency
  4. Work function of the photocathode
  5. I-V characteristics of a photocell at different intensities
02Charge and Charge-to-Mass Ratio of Electron 4 टॉपिक
  1. e/m by Thomson's method (crossed electric and magnetic fields)
  2. e/m by magnetron valve method
  3. e/m using Helmholtz coils
  4. Millikan's oil-drop method for electronic charge
03Hall Effect and Semiconductors 4 टॉपिक
  1. Hall voltage versus current and magnetic field
  2. Hall coefficient and sign of charge carriers
  3. Carrier concentration and mobility
  4. Band gap of a semiconductor by four-probe method
04Atomic Spectra and Excitation Potentials 5 टॉपिक
  1. Wavelengths of mercury lines using diffraction grating
  2. Rydberg constant from hydrogen Balmer lines
  3. Resolving the sodium D lines
  4. Franck-Hertz experiment: excitation potential
  5. Error analysis and writing the practical record

परिचय

आप यह कर पाएँगे

  • Determine Planck's constant using LEDs and the photoelectric effect
  • Find the charge-to-mass ratio (e/m) of the electron by Thomson's method
  • Measure the Hall coefficient and carrier concentration of a semiconductor sample
  • Measure spectral line wavelengths and the Rydberg constant with a grating spectrometer
  • Record observations, plot graphs, estimate errors and face the practical viva confidently

यह किसके लिए है

  • B.Sc Physics students of Semester 5 (UP State Universities, NEP 2020)
  • Students preparing for the B.Sc practical examination and viva
  • Learners who want hands-on practice with modern physics apparatus

आपको क्या चाहिए

  • Theory of Semester 5 modern physics (quantum and atomic physics)
  • Basic graph plotting and error calculation

सवाल

Which syllabus does this lab course follow?

It follows the B.Sc Physics Semester 5 syllabus of the UP State Universities (NEP 2020 common minimum syllabus). Where your own university's syllabus differs, the centre follows your university syllabus.

How are students assessed at the centre?

The trainer watches each experiment and marks it on a rubric (set-up, observations, calculation and viva); viva-style questions revise the theory behind the experiments.

Will this help in the semester examination?

Yes. The experiments match the university practical examination, including the record file and viva.

Download the syllabus (PDF)

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