NEET 2018 Physics Paper with Solutions (Step by Step)
NEET Physics is considered one of the toughest sections of the National Eligibility cum Entrance Test (NEET). Students who aspire to become doctors often find numerical problems, derivations of formulas, and conceptual questions challenging. Therefore, one of the most effective ways to improve Physics preparation is by solving previous years’ question papers such as the NEET 2018 Physics paper.
The NEET 2018 Physics paper provides valuable insights into the types of questions asked in the exam, their difficulty level, and frequently repeated topics. Learning step-by-step solutions helps students develop strong conceptual clarity and improve problem-solving abilities.
Many NEET aspirants also analyze their performance using a NEET Rank Predictor after solving practice papers. This tool helps students estimate their possible rank based on their scores.
In this article, we will discuss step-by-step solutions to some important questions from the NEET 2018 Physics paper, key topics covered, and how solving them can improve your preparation.
NEET 2018 Physics Paper Analysis: Overview
The NEET 2018 Physics section consisted of 45 multiple-choice questions (MCQs). Each question carried 4 marks, and 1 mark was deducted for each incorrect answer.
The questions were based on topics from both Class 11 and Class 12 Physics, including:
Laws of Motion
Work, Energy and Power
Thermodynamics
Current Electricity
Electrostatics
Modern Physics
Ray Optics
Students who prepared these topics thoroughly were able to score well in the Physics section.
After attempting the paper, many aspirants calculate their expected scores and check their performance using a NEET Rank Predictor to estimate their rank.
Step-by-Step Solutions to Important NEET 2018 Physics Questions
Below are simplified explanations for some representative questions from the NEET 2018 Physics paper.
Question 1: Centripetal Force in Circular Motion
Question
A particle moves in circular motion with uniform velocity. If the speed of the particle is doubled while the radius remains the same, how does the centripetal force change?
Step-by-Step Solution
The formula for centripetal force is:
F = mv² / r
If the velocity becomes 2v, substitute the value in the formula:
F = m(2v)² / r
F = 4mv² / r
Thus, the centripetal force becomes four times the original force.
Correct Answer: Four times the initial value.
This question checks conceptual understanding of circular motion.
Question 2: Ohm’s Law and Resistance
Question
A potential difference of 20 volts is applied across a resistor of 10 ohms. What is the current flowing through the resistor?
Step-by-Step Solution
Using Ohm’s Law:
V = IR
Substitute the values:
20 = I × 10
Solve for current:
I = 20 / 10
I = 2 amperes
Correct Answer: 2 A
This is a fundamental question testing the basics of electric circuits.
Question 3: Work Done
Question
A 10 N force acts on an object and moves it 5 meters in the same direction as the force. Calculate the work done.
Step-by-Step Solution
Work done formula:
W = F × d
Substitute the values:
W = 10 × 5
W = 50 Joules
Correct Answer: 50 J
This question is based on the work and energy concept.
Question 4: Photon Energy
Question
If a photon has a frequency of 6 × 10¹⁴ Hz, what is its energy?
(Planck's constant h = 6.63 × 10⁻³⁴ J·s)
Step-by-Step Solution
Energy of a photon:
E = hν
Substitute the values:
E = (6.63 × 10⁻³⁴) × (6 × 10¹⁴)
Multiply:
E = 39.78 × 10⁻²⁰
Simplify:
E ≈ 3.98 × 10⁻¹⁹ J
Correct Answer: ≈ 4 × 10⁻¹⁹ Joules
This question belongs to Modern Physics, one of the most scoring topics in NEET.
Question 5: Gravitational Force
Question
Two masses are placed 1 meter apart. Calculate the gravitational force between them.
(G = 6.67 × 10⁻¹¹)
Step-by-Step Solution
Newton’s law of gravitation:
F = Gm₁m₂ / r²
Substitute values:
F = (6.67 × 10⁻¹¹ × 2 × 3) / (1)²
Multiply:
F = (6.67 × 10⁻¹¹ × 6)
F = 4.002 × 10⁻¹⁰ N
Correct Answer: 4.0 × 10⁻¹⁰ N
NEET 2018 Physics Key Topics
The NEET 2018 Physics paper included questions from several important areas.
Mechanics
Mechanics is the foundation of Physics and includes:
Laws of motion
Work, energy and power
Rotational motion
Gravitation
Electricity and Magnetism
This section tests concepts related to electrical circuits and electromagnetic phenomena.
Important topics include:
Ohm’s Law
Electric potential
Magnetic fields
Thermodynamics
Questions focus on heat transfer, energy conversion, and thermodynamic laws.
Optics
Topics include:
Reflection
Refraction
Lenses and mirrors
Modern Physics
Modern Physics is considered highly scoring and includes:
Photoelectric effect
Atomic structure
Students who master these topics often improve their scores significantly.
Many aspirants estimate their expected rank after solving such questions using a NEET Rank Predictor.
Benefits of Solving NEET 2018 Physics Paper
Solving previous year question papers offers several advantages.
Understanding Question Patterns
Students learn how concepts are tested in the exam.
Improving Speed and Accuracy
Regular practice helps students solve numerical problems faster.
Strengthening Conceptual Clarity
Step-by-step solutions help build a clear understanding of problem-solving approaches.
Performance Evaluation
Using tools like the NEET Rank Predictor, students can analyze their performance and track their improvement.
Importance of NMC, WHO and WDOMS Recognition
After qualifying NEET, students must carefully choose medical colleges. It is important that the institution is recognized by major regulatory bodies.
NMC (National Medical Commission)
The NMC regulates medical education in India and ensures that medical colleges maintain high academic standards.
WHO (World Health Organization)
The WHO works globally to promote healthcare development and supports international medical education standards.
WDOMS (World Directory of Medical Schools)
The WDOMS maintains a global database of recognized medical schools. Degrees from WDOMS-listed institutions are widely recognized internationally.
Students planning to study medicine abroad must ensure their university is recognized by NMC, acknowledged by WHO, and listed in WDOMS.
Tips for Scoring Higher in NEET Physics
Physics can become a scoring subject with the right preparation strategy.
Important tips include:
Understand formulas instead of memorizing them
Practice numerical problems regularly
Solve previous years’ NEET question papers
Focus on conceptual clarity
Analyze mistakes carefully
Track progress using a NEET Rank Predictor
Conclusion
The NEET 2018 Physics paper offers helpful details about the exam pattern and the level of conceptual understanding required. Students who solve these questions step-by-step can significantly improve their problem-solving skills and confidence.
Regular practice of previous year papers, strong conceptual clarity, and consistent revision can greatly enhance Physics performance.
Students should also use tools like the NEET Rank Predictor to check how well they are prepared and make sure that the medical schools they want to go to are recognized by groups like the NMC, WHO, and WDOMS.
With disciplined preparation and continuous practice, NEET aspirants can increase their chances of securing admission to top medical colleges.
