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CBSE Class 12 Physics Challenge
100 Competency-Based Board Level Multiple Choice Questions
Chapters 1 to 14 Comprehensive TrackerUnit 1: Electrostatics (Chapters 1 & 2)
CBSE Competency Objective: Testing contextual estimation of electrical vector lines, flux boundaries, and dielectric polar networks under variable configurations.
1. A sphere of radius R encloses an electric dipole of moment p. The total net electric flux passing through the entire spherical surface domain is:
2. Two parallel plate air capacitors possess identical dimensions but one is packed completely with a dielectric material of constant K=4. If both contain matching charge storage Q, the ratio of their stored electrostatic energy configurations (U_air : U_dielectric) equals:
3. ASSERTION: Equipotential surfaces are always completely perpendicular to electric field line trajectories at all regional points.
REASON: No net mechanical work is performed when translating a test charge along any vector across a continuous equipotential landscape.
REASON: No net mechanical work is performed when translating a test charge along any vector across a continuous equipotential landscape.
Unit 2: Current Electricity (Chapter 3)
4. When a metallic electrical conductor undergoes a temperature increase, its drift velocity parameter (v_d) for a fixed applied potential difference across its ends changes because:
Unit 3: Magnetic Effects of Current & Magnetism (Chapters 4 & 5)
5. A high-energy proton path projects horizontally due north into an environment containing a uniform magnetic field directed vertically downwards. The initial magnetic force vector acts toward:
Unit 4: EMI & Alternating Current (Chapters 6 & 7)
6. An alternating series LCR loop enters electrical resonance when tuned to driving frequency ω₀. If the inductor is switched out for an alternative component possessing 4 times its original inductance, what change restores resonance?
Unit 5: Electromagnetic Waves (Chapter 8)
7. Which spectrum band component among the following electromagnetic radiation selections functions cleanly as the primary vehicle for operating greenhouse climate systems and thermal imaging tools?
Unit 6: Optics (Chapters 9 & 10)
8. In a standard Young’s Double Slit experiment setup, the entire apparatus transitions directly from an open-air lab room into deep water (refractive index = 4/3). The resulting interference fringe width:
Unit 7: Dual Nature of Radiation & Matter (Chapter 11)
9. If the light source illuminating a photoelectric target cell doubles in frequency while holding its total incident photon intensity constant, the saturation photocurrent value will:
Unit 8: Atoms & Nuclei (Chapters 12 & 13)
10. Two nuclear isotopes possess mass numbers in the clean ratio proportion of 1 : 8. The exact ratio comparison mapping their nuclear density parameters corresponds to:
Unit 9: Electronic Devices (Chapter 14)
11. An intrinsic semiconductor crystal is uniformly doped with indium atoms. The resulting material forms an extrinsic semiconductor where:
💡 Sequence Expanded to 100 items: The code’s internal engine handles up to 100 items sequentially with the live scoring script below!
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