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RRB NTPC Physics Questions
Practise physics (science) for the RRB Non-Technical Popular Categories Examination: 10 multiple-choice questions, each with the correct answer and a worked explanation. Click an option to check it, or “New questions” for another set.
Physics practice
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Q1.The bending of light as it passes from one medium to another is:
Show answer & explanation
Answer: A — Refraction
Refraction is caused by a change in light’s speed.
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Q2.Find the kinetic energy of a 36 kg body moving at 14 m/s.
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Answer: B — 3,528 J
KE = ½mv² = ½ × 36 × 14² = 3,528 J.
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Q3.The frequency of a wave is measured in:
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Answer: B — Hertz
1 hertz = 1 cycle per second.
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Q4.A current of 2.5 A flows through a 12 Ω resistor. What is the potential difference across it?
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Answer: A — 30 V
Ohm’s law: V = IR = 2.5 × 12 = 30 V.
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Q5.The speed of light in vacuum is approximately:
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Answer: A — 3 × 10⁸ m/s
c ≈ 2.998 × 10⁸ m/s.
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Q6.What force is needed to accelerate a 16 kg mass at 5 m/s²?
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Answer: C — 80 N
F = ma = 16 × 5 = 80 N.
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Q7.The unit of electrical resistance is the:
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Answer: B — Ohm
Resistance is measured in ohms (Ω).
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Q8.A body starts at 8 m/s and accelerates uniformly at 3 m/s² for 2 s. Find its final velocity.
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Answer: B — 14 m/s
v = u + at = 8 + 3×2 = 14 m/s.
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Q9.A transformer works on the principle of:
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Answer: D — Mutual induction
A changing current in one coil induces a voltage in the other.
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Q10.Find the kinetic energy of a 3 kg body moving at 6 m/s.
Show answer & explanation
Answer: A — 54 J
KE = ½mv² = ½ × 3 × 6² = 54 J.
How to approach physics questions
Write the formula before substituting and keep SI units throughout. Most numerical questions use one of: v = u + at, s = ut + ½at², F = ma, KE = ½mv², V = IR, P = I²R.
About RRB NTPC
RRB Non-Technical Popular Categories Examination — conducted by Railway Recruitment Boards (RRB). Recruits clerks, station masters, goods guards and other non-technical posts for Indian Railways.
Original practice questions written for this site in the style and difficulty of each exam’s syllabus. They are not past papers and the site is not affiliated with any exam body. Exam patterns, marking schemes and syllabi change — always check the latest official notification.
RRB NTPC practice topics
| Topic | Section | Question source |
|---|---|---|
| Number System & Simplification | Quantitative aptitude | Calculated (new numbers every set) |
| Percentages | Quantitative aptitude | Calculated (new numbers every set) |
| Time, Work & Pipes | Quantitative aptitude | Calculated (new numbers every set) |
| Logical Reasoning | Reasoning | Calculated (new numbers every set) |
| Indian Polity, History & Geography | General awareness | Question bank |
| Physics | Science | Calculated + question bank |