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Modern Physics Preparation Hub

Master Modern Physics with coaching-grade theory notes, verified video lectures, and 10 interactive MCQs with instant mistake analysis. Continue with 500+ adaptive questions inside the Exam Sprinter app.

πŸ“˜ Theory Notes✍️ Interactive Practice⏱️ CBT Simulator

What is Modern Physics?

Modern Physics covers the essential principles and concepts required for JEE Main.

πŸ’‘ Why Study Modern Physics?

Highly important, frequently tested in JEE Main.

ParameterDetails / Relevance
Target ExamJEE Main
Subject CategoryPhysics
Estimated Study Duration10 Hours
Expected Questions2 Questions
Difficulty IndexMedium
Interactive Solved MCQs10 Questions with AI Diagnostics
Adaptive App Practice500+ Questions & Real-Time AI Tutor

⚠️ Common Pitfalls to Avoid

  • Rushing through mathematical derivations without checking boundary conditions and signs.
  • Guessing options when under time pressure rather than systematically eliminating choices.
  • Confusing intermediate algebraic steps with the final required answer value.
βœ“ COACHING-GRADE CLASSROOM NOTES

Modern Physics Theory & Derivations

Browse All Notes Library β€Ί

Access comprehensive classroom-grade derivations and NCERT micro-extracts for Modern Physics. Features step-by-step proofs and standard assumptions.

Important Formulas & Cheat Sheet

  • $$E = hf = \frac{hc}{\lambda}$$
  • $$\lambda = \frac{h}{mv}$$ (de Broglie)
  • $$E_n = -\frac{13.6}{n^2}$$ eV
  • $$N = N_0 e^{-\lambda t}$$
✍️ STEP 3: PRACTICE & ANALYZE

Modern Physics Interactive Practice

⏱️ Take Chapter CBT Test

Solve these 10 standard exam-level questions. The system tracks your response time, detects rapid guessing via Cognitive Reading Thresholds, and outputs your post-session diagnosis.

Interactive Practice Progress:0 / 10 Answered
Q1Photoelectric Effect & de Broglie
Expected: 60sEasy

During the propagation of electromagnetic waves in a medium :

Q2Bohr Model & Atomic Spectra
Expected: 60sEasy

Identify the logic operation carried out.

Q3Nuclear Reactions & Radioactivity
Expected: 60sEasy

The reading of the ammeter for a silicon diode in the given circuit is :

Q4Photoelectric Effect & de Broglie
Expected: 60sEasy

If the kinetic energy of a free electron doubles, it's deBroglie wavelength changes by the factor

Q5Bohr Model & Atomic Spectra
Expected: 90sMedium

Given below are two statements : Statement I : Figure shows the variation of stopping potential with frequency (v)(v) for the two photosensitive materials M1M_1 and M2M_2. The slope gives value of he\frac{h}{e}, where hh is Planck's constant, e is the charge of electron. Statement II : M2\mathrm{M}_2 will emit photoelectrons of greater kinetic energy for the incident radiation having same frequency. In the light of the above statements, choose the most appropriate answer from the options given below.

Q6Nuclear Reactions & Radioactivity
Expected: 90sMedium

The following diagram shows a Zener diode as a voltage regulator. The Zener diode is rated at Vz=5Β VV_z=5 \mathrm{~V} and the desired current in load is 5 mA . The unregulated voltage source can supply upto 25 V . Considering the Zener diode can withstand four times of the load current, the value of resistor RsR_s (shown in circuit) should be ____\_\_\_\_ Ξ©\Omega.

Q7Photoelectric Effect & de Broglie
Expected: 90sMedium

In a photoelectric experiment, the wavelength of the light incident on a metal is changed from 300 nm to 400 nm. The decrease in the stopping potential is close to: (hce{{{hc} \over e}} = 1240 nm eV)

Q8Bohr Model & Atomic Spectra
Expected: 90sMedium

In the hydrogen atom, the electron makes a transition from the higher orbit (i) to a lower orbit (f)(f). The ratio of the radius of the orbits in given by ri:rf=16:4r_i: r_f=16: 4. The wavelength of photon emitted due to this transition is ____\_\_\_\_ nm. (Given Rydberg constant =1.0973Γ—107/m=1.0973 \times 10^7 / \mathrm{m} )

Q9Nuclear Reactions & Radioactivity
Expected: 120sHard

An electron from various excited states of hydrogen atom emit radiation to come to the ground state. Let Ξ»n{\lambda _n}, Ξ»g{\lambda _g} be the de Broglie wavelength of the electron in the nth state and the ground state respectively. Let Ξ›n{\Lambda _n} be the wavelength of the emitted photon in the transition from the nth state to the ground state. For large n, (A, B are constants)

Q10Photoelectric Effect & de Broglie
Expected: 120sHard

For a nucleus AAX{ }_{\mathrm{A}}^{\mathrm{A}} \mathrm{X} having mass number A\mathrm{A} and atomic number Z\mathrm{Z} A. The surface energy per nucleon (bs)=βˆ’a1A2/3\left(b_{\mathrm{s}}\right)=-a_{1} A^{2 / 3}. B. The Coulomb contribution to the binding energy bc=βˆ’a2Z(Zβˆ’1)A4/3\mathrm{b}_{\mathrm{c}}=-a_{2} \frac{Z(Z-1)}{A^{4 / 3}} C. The volume energy bv=a3A\mathrm{b}_{\mathrm{v}}=a_{3} A D. Decrease in the binding energy is proportional to surface area. E. While estimating the surface energy, it is assumed that each nucleon interacts with 12 nucleons. ( a1,a2a_{1}, a_{2} and a3a_{3} are constants) Choose the most appropriate answer from the options given below:

πŸ—ΊοΈ Recommended Learning Sequence

Electromagnetic Inductionβž”Modern Physics (Current)

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