The Bihar Police Assistant Sub-Inspector (ASI) examination is a prestigious recruitment process conducted to select capable and dedicated candidates for supervisory roles in the Bihar Police force. This post acts as a crucial link between senior officers and constables, ensuring effective law enforcement and maintenance of public order at the grassroots level. An ASI is responsible for assisting in investigations, maintaining records, supervising constables, handling public complaints, and supporting senior officers during operations.
The recruitment process generally includes a written examination, physical efficiency test, and document verification, designed to assess the candidate’s knowledge, physical fitness, discipline, and leadership qualities. A career as a Bihar Police ASI offers job security, respect in society, steady career growth, and the opportunity to serve the state with pride and responsibility. It is an excellent choice for aspirants who wish to contribute to public safety and administrative efficiency.
Bihar Police Assistant Sub-Inspector: Overview Table
| Feature | Details |
| Post Name | Assistant Sub-Inspector (Operation) |
| Total Vacancies | 462 |
| Pay Level | Level-5 |
| Application Dates | Feb 4, 2026 – March 4, 2026 |
| Educational Qualification | B.Sc with Physics (Min. 50% marks; 45% for SC/ST) |
| Selection Process | Prelims, Mains, PET, and Medical Exam |
| Official Website | bpssc.bihar.gov.in |
Bihar Police Assistant Sub-Inspector: Exam Pattern
The examination is structured to test both general awareness and specialized technical knowledge in Physics.
1. Preliminary Examination
The first hurdle is an objective-type test consisting of 100 questions for a total of 100 marks, with a duration of 2 hours.
Subject | Number of Questions | Focus Area |
Physics | 60 | Core B.Sc-level physics concepts |
General Knowledge & Current Affairs | 40 | National & international events, sports, awards, and Bihar-specific history & geography |
2. Main Examination
Candidates who clear the Prelims (minimum 30% marks required) advance to the Mains. This stage typically includes:
Paper | Subject | Nature / Details |
Paper I | General Hindi | Qualifying in nature (minimum 30% marks); tests grammar, comprehension, and vocabulary |
Paper II | Technical & General Studies | In-depth evaluation of Physics, Mathematics, and General Science |
3. Physical Efficiency Test (PET)
Physical standards are mandatory.
| Event | Male Requirement | Female Requirement |
| Running | 1.6 km in 6 minutes | 1 km in 6 minutes |
| High Jump | Minimum 4 feet | Minimum 3 feet |
| Long Jump | Minimum 12 feet | Minimum 9 feet |
| Shot Put | 16-pound ball to 16 feet | 12-pound ball to 10 feet |
Bihar Police Assistant Sub-Inspector: Syllabus
Stage 1: Preliminary Examination Syllabus
The Preliminary exam is objective and focuses on two primary areas to shortlist candidates for the Mains.
| Subject | Detailed Topics |
| Physics (60 Questions) | Core Concepts: Units & Dimensions, Motion & Laws of Motion, Work, Energy & Power, Gravitation. Bulk Matter: Heat & Thermodynamics (Kinetic Theory of Gases), Waves & Sound, Properties of Matter. Electromagnetism: Electrostatics, Current Electricity (Ohm’s Law), Magnetic Induction. Optics: Reflection, Refraction, Interference, and Diffraction. Modern Physics: Atomic Structure, Radioactivity, Nuclear Reactions, and Semiconductor Basics. |
| General Knowledge & Current Affairs (40 Questions) | National & International: Current events, summits, conferences, and sports. Bihar-Specific: History, geography, and socio-economic conditions of Bihar. General Awareness: Awards & Honors, Books & Authors, Capitals & Currencies, and Important National Facts. |
Stage 2: Main Examination Syllabus
The Mains exam consists of two papers, with Paper II being the primary merit-decider.
Paper I: Language (Qualifying)
This paper is split between Hindi and English to test intermediate-level proficiency.
| Language | Detailed Syllabus Topics |
| General Hindi (50 Marks) | Grammar: Sandhi, Samas, Tatsam/Tadbhav, and Sentence Correction. Vocabulary: Synonyms (Paryayvachi), Antonyms (Vilom), and One-word substitutions. Comprehension: Unseen passages and idioms/phrases. |
| General English (50 Marks) | Grammar: Articles, Prepositions, Active & Passive Voice, and Direct & Indirect Speech. Writing & Usage: Fill in the blanks, Synonyms/Antonyms, and error identification. |
Paper II: Technical Physics (Merit Paper)
This paper requires graduate-level (B.Sc) knowledge and carries 100 marks.
| Technical Unit | In-Depth Topics |
| Classical & Statistical Mechanics | Lagrangian & Hamiltonian Formulations, Central Force Motion, Maxwell-Boltzmann, and Fermi-Dirac Statistics. |
| Quantum Mechanics | Wave–Particle Duality, Schrodinger Equation, and the Hydrogen Atom model. |
| Electrodynamics | Maxwell’s Equations, Electromagnetic Waves, and Dielectrics. |
| Electronics & Digital Logic | PN Junctions, Transistors, and Digital Logic Gates. |
| Atomic & Nuclear Physics | Particle Accelerators, Radioactivity, and Nuclear Reactors. |
Quick Summary Table for Strategy
| Exam Stage | Total Marks | Duration | Negative Marking | Qualifying Mark |
| Prelims | 100 | 2 Hours | 0.2 Marks/Wrong | 30% |
| Mains Paper I | 100 | 1.5 Hours | N/A | 30% |
| Mains Paper II | 100 | 3 Hours | 0.2 Marks/Wrong | 33% |
Detailed Preparation Strategy
Academic Preparation (Written Exam)
| Phase | Focus Area | Action Plan |
| Phase 1: Foundation | Physics & GK Basics | Study NCERTs (Class 11-12) and B.Sc Physics textbooks. Use Lucent’s GK for static topics. |
| Phase 2: Practice | Numerical & Current Affairs | Solve 20-25 Physics numericals daily. Read a daily newspaper (The Hindu/Hindustan) for local and national news. |
| Phase 3: Revision | Mock Tests & PYQs | Attempt at least 2 full-length mock tests weekly. Analyze errors to identify weak conceptual gaps. |
Physical Training (PET)
| Activity | Frequency | Pro Tip |
| Stamina Building | Daily (Morning) | Start with 2km light jogging to build endurance before focusing on speed for the 1.6km sprint. |
| Strength Drills | 3 Times/Week | Practice push-ups and squats to improve explosive power for high jump and long jump. |
| Skill Practice | Alternate Days | Dedicate specific days to Shot Put technique and High Jump form to avoid injury. |
Key Tips for Success
- Don’t Ignore Hindi: While qualifying, failing Paper I will disqualify you entirely from the merit list.
- Bihar-Specific Knowledge: Questions on Bihar’s role in the freedom struggle and its geography are frequent high-weightage topics.
- Stay Healthy: Maintain a protein-rich diet (eggs, pulses) to support physical training and ensure 7-8 hours of sleep for mental clarity.
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