100+ Free BSF HC RO/RM Practice Questions

Pass your BSF Head Constable (Radio Operator / Radio Mechanic) Written Examination exam on the first try — instant access, no signup required.

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2026 Statistics

Key Facts: BSF HC RO/RM Exam

100 / 200

MCQs / marks (2 marks each)

BSF HC RO/RM 2025 exam pattern (Adda247, PW, Testbook)

2 hours

CBT duration

BSF Head Constable RO/RM notification summaries

40-20-20-20

Physics / Maths / Chemistry / English-GK split

Official-pattern summaries for BSF HC RO/RM 2025

38% / 33%

Qualifying marks (UR-OBC-EWS / SC-ST)

BSF HC RO/RM qualifying marks in 2025 notification

Rs 100

Application fee (Gen/OBC/EWS male)

BSF HC RO/RM 2025 fee structure (Adda247, Testbook)

BSF HC (RO/RM) CBT: 100 MCQs / 200 marks / 2 hours at 10+2 level — Physics 40, Maths 20, Chemistry 20, English & GK 20. Negative marking 0.25 per wrong answer. Qualifying marks 38% (UR/OBC/EWS) and 33% (SC/ST). Application fee Rs 100 for eligible male Gen/OBC/EWS. RO post adds dictation (50 marks) after CBT.

Sample BSF HC RO/RM Practice Questions

Try these sample questions to test your BSF HC RO/RM exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1The SI unit of electric current is:

A.Ampere

B.Volt

C.Ohm

D.Coulomb

Explanation: Electric current is measured in amperes (A) in the SI system. One ampere equals one coulomb of charge passing per second.

2Which law states that the force between two point charges is inversely proportional to the square of the distance between them?

A.Ohm's law

B.Coulomb's law

C.Faraday's law

D.Ampere's law

Explanation: Coulomb's law describes the electrostatic force between two stationary point charges: F ∝ q₁q₂/r², where r is the separation distance.

3The speed of light in vacuum is approximately:

A.3 × 10⁶ m/s

B.3 × 10¹⁰ m/s

C.3 × 10⁸ m/s

D.3 × 10⁵ m/s

Explanation: The speed of electromagnetic waves in vacuum is c ≈ 3 × 10⁸ m/s. This constant appears throughout optics and radio-wave propagation.

4A convex lens converges parallel rays of light to a point called the:

A.Optical centre

B.Pole

C.Centre of curvature

D.Principal focus

Explanation: For a convex lens, rays parallel to the principal axis converge at the principal focus (F) on the opposite side of the lens.

5The phenomenon responsible for the blue colour of the sky is:

A.Rayleigh scattering

B.Reflection

C.Refraction

D.Total internal reflection

Explanation: Rayleigh scattering preferentially scatters shorter (blue) wavelengths of sunlight by air molecules, making the sky appear blue.

6According to Newton's second law of motion, force equals:

A.Mass × velocity

B.Mass × acceleration

C.Mass × displacement

D.Mass × time

Explanation: Newton's second law states F = ma: net force on a body equals its mass times acceleration.

7The unit of frequency is:

A.Watt

B.Joule

C.Hertz

D.Pascal

Explanation: Frequency (number of cycles per second) is measured in hertz (Hz). Radio frequencies are expressed in kHz, MHz, or GHz.

8Which electromagnetic wave has the longest wavelength among the following?

A.Visible light

B.X-rays

C.Gamma rays

D.Radio waves

Explanation: In the EM spectrum, radio waves have the longest wavelength and lowest frequency; gamma rays have the shortest wavelength.

9The resistance of a conductor is directly proportional to its:

A.Length

B.Cross-sectional area

C.Temperature decrease

D.Conductivity

Explanation: For a uniform conductor, R = ρL/A, so resistance increases with length and decreases with larger cross-sectional area.

10The power dissipated in a resistor carrying current I with resistance R is:

A.IR²

B.I²R

C.I/R

D.R/I

Explanation: Electrical power P = VI = I²R = V²/R. For a given current, power dissipated as heat is I²R (Joule heating).

About the BSF HC RO/RM Exam

The BSF Head Constable (Radio Operator and Radio Mechanic) written examination is the Computer-Based Test (CBT) used to recruit technical personnel for the Force communication setup. After PST/PET, candidates sit a 2-hour objective paper with 100 multiple-choice questions worth 200 marks (2 marks each). The paper is weighted heavily toward Physics (40 questions), with Mathematics (20), Chemistry (20), and English & General Knowledge (20) at the 10+2 intermediate level. Wrong answers carry 0.25 negative marking. Qualifying cut-offs are typically 38% for General/OBC/EWS and 33% for SC/ST. Head Constable (Radio Operator) candidates additionally face a dictation test (50 marks) and a qualifying paragraph reading test. Selection continues through document verification and medical examination.

Questions

100 scored questions

Time Limit

2 hours (120 minutes)

Passing Score

38% minimum qualifying marks (General/OBC/EWS); 33% (SC/ST); 20% (Ex-Servicemen/CA as notified) in the written CBT

Exam Fee

Rs 100 for General/OBC/EWS male candidates; SC/ST/ESM/CA/departmental/female exempt — confirm CSC charges in live notification (Border Security Force (BSF), Ministry of Home Affairs — applications via rectt.bsf.gov.in)

BSF HC RO/RM Exam Content Outline

40%

Physics

40 questions / 80 marks — mechanics, optics, thermodynamics, electricity, magnetism, modern physics, waves, electronics

20%

Mathematics

20 questions / 40 marks — algebra, trigonometry, calculus, coordinate geometry, probability, matrices, statistics

20%

Chemistry

20 questions / 40 marks — atomic structure, bonding, organic chemistry, electrochemistry, equilibrium, kinetics

20%

English & General Knowledge

20 questions / 40 marks — grammar, vocabulary, comprehension, Indian polity/geography/history, defence awareness

How to Pass the BSF HC RO/RM Exam

What You Need to Know

Passing score: 38% minimum qualifying marks (General/OBC/EWS); 33% (SC/ST); 20% (Ex-Servicemen/CA as notified) in the written CBT
Exam length: 100 questions
Time limit: 2 hours (120 minutes)
Exam fee: Rs 100 for General/OBC/EWS male candidates; SC/ST/ESM/CA/departmental/female exempt — confirm CSC charges in live notification

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

BSF HC RO/RM Study Tips from Top Performers

1Prioritise Physics — it is 40% of the paper and often the deciding section for RO/RM merit.

2Practise with negative marking in mind: blind guessing costs 0.25 marks; eliminate options before attempting uncertain items.

3Revise NCERT Class 11–12 Physics, Chemistry, and Mathematics fundamentals before attempting advanced problem sets.

4For RO candidates, schedule daily dictation and paragraph reading practice alongside CBT prep.

5Build a GK notebook covering Indian Constitution articles, rivers, defence forces (especially BSF border role), and recent national events.

6Take full 100-question / 2-hour timed mocks weekly in the final month before the exam.

7Maintain PST/PET fitness throughout — physical disqualification ends candidature regardless of written score.

Frequently Asked Questions

What is the BSF Head Constable RO/RM written exam pattern?

The CBT has 100 objective MCQs for 200 marks in 2 hours. Physics carries 40 questions (80 marks), Mathematics 20 (40 marks), Chemistry 20 (40 marks), and English & GK 20 (40 marks). Each correct answer earns 2 marks; each wrong answer loses 0.25 marks.

What are the qualifying marks for the BSF HC RO/RM CBT?

Minimum qualifying marks are typically 38% for General/OBC/EWS and 33% for SC/ST in the written examination. Ex-Servicemen/CA categories may have a lower threshold (commonly 20%) as notified. Final selection also depends on PST/PET, dictation (for RO), and medical fitness.

Is there negative marking?

Yes. Recent BSF HC (RO/RM) notifications specify 0.25 marks deducted for each incorrect answer (1/8 mark per wrong response on a 2-mark question).

How much is the application fee?

The 2025 notification cites Rs 100 for General/OBC/EWS male candidates, with SC/ST/ESM/CA/departmental/female candidates exempt. CSC applications may attract separate service charges. Confirm the fee table on rectt.bsf.gov.in for your cycle.

What is the difference between RO and RM posts?

Both share the same CBT paper. Head Constable (Radio Operator) — 910 vacancies in the 2025 cycle — additionally faces a dictation test (50 marks) and a qualifying paragraph reading test. Head Constable (Radio Mechanic) — 211 vacancies — selection emphasises CBT merit among the notified stages without the dictation component.

What educational qualification is required?

Candidates need 12th pass with Physics, Chemistry, Mathematics (minimum 60% aggregate in PCM) OR Matriculation plus a 2-year ITI certificate in a related trade such as Radio & Television, Electronics, COPA, or DEO as listed in the advertisement.

What is the selection process?

Typical stages include Physical Standards Test (PST) and Physical Efficiency Test (PET), the written CBT, dictation and paragraph reading (RO only), document verification, and Detailed Medical Examination, followed by a final merit list.

Where do I apply?

Online applications are submitted through the BSF recruitment portal at https://rectt.bsf.gov.in/ when Head Constable (RO/RM) vacancies are advertised.