JEE Main MCQ & Objective Questions

The JEE Main exam is a crucial step for students aspiring to enter prestigious engineering colleges in India. It tests not only knowledge but also the ability to apply concepts effectively. Practicing MCQs and objective questions is essential for scoring better, as it helps in familiarizing students with the exam pattern and enhances their problem-solving skills. Engaging with practice questions allows students to identify important questions and strengthen their exam preparation.

What You Will Practise Here

  • Fundamental concepts of Physics, Chemistry, and Mathematics
  • Key formulas and their applications in problem-solving
  • Important definitions and theories relevant to JEE Main
  • Diagrams and graphical representations for better understanding
  • Numerical problems and their step-by-step solutions
  • Previous years' JEE Main questions for real exam experience
  • Time management strategies while solving MCQs

Exam Relevance

The topics covered in JEE Main are not only significant for the JEE exam but also appear in various CBSE and State Board examinations. Many concepts are shared with the NEET syllabus, making them relevant across multiple competitive exams. Common question patterns include conceptual applications, numerical problems, and theoretical questions that assess a student's understanding of core subjects.

Common Mistakes Students Make

  • Misinterpreting the question stem, leading to incorrect answers
  • Neglecting units in numerical problems, which can change the outcome
  • Overlooking negative marking and not managing time effectively
  • Relying too heavily on rote memorization instead of understanding concepts
  • Failing to review and analyze mistakes from practice tests

FAQs

Question: How can I improve my speed in solving JEE Main MCQ questions?
Answer: Regular practice with timed quizzes and focusing on shortcuts can significantly enhance your speed.

Question: Are the JEE Main objective questions similar to previous years' papers?
Answer: Yes, many questions are based on previous years' patterns, so practicing them can be beneficial.

Question: What is the best way to approach JEE Main practice questions?
Answer: Start with understanding the concepts, then attempt practice questions, and finally review your answers to learn from mistakes.

Now is the time to take charge of your preparation! Dive into solving JEE Main MCQs and practice questions to test your understanding and boost your confidence for the exam.

Q. In a double-slit experiment, if the distance between the slits is 0.2 mm and the distance to the screen is 1 m, what is the fringe width for light of wavelength 600 nm?
  • A. 0.3 mm
  • B. 0.6 mm
  • C. 0.9 mm
  • D. 1.2 mm
Q. In a double-slit experiment, if the distance between the slits is 0.5 mm and the distance to the screen is 2 m, what is the distance between the first and second bright fringes if the wavelength of light used is 500 nm?
  • A. 0.5 cm
  • B. 1 cm
  • C. 1.5 cm
  • D. 2 cm
Q. In a double-slit experiment, if the distance between the slits is 0.5 mm and the wavelength of light is 400 nm, what is the distance between the first and second bright fringes?
  • A. 0.4 m
  • B. 0.8 m
  • C. 1.2 m
  • D. 1.6 m
Q. In a double-slit experiment, if the distance between the slits is doubled while keeping the wavelength constant, what happens to the fringe width?
  • A. Doubles
  • B. Halves
  • C. Remains the same
  • D. Quadruples
Q. In a double-slit experiment, if the distance between the slits is doubled, how does the fringe width change?
  • A. Doubles
  • B. Halves
  • C. Remains the same
  • D. Quadruples
Q. In a double-slit experiment, if the distance between the slits is doubled, what happens to the fringe separation on the screen?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. In a double-slit experiment, if the distance between the slits is doubled, what happens to the fringe width?
  • A. Doubles
  • B. Halves
  • C. Remains the same
  • D. Quadruples
Q. In a double-slit experiment, if the distance between the slits is halved, what happens to the fringe separation on the screen?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. In a double-slit experiment, if the distance between the slits is increased, what happens to the interference pattern?
  • A. Fringes become wider
  • B. Fringes become narrower
  • C. Fringes disappear
  • D. Fringes remain unchanged
Q. In a double-slit experiment, if the distance between the slits is increased, what happens to the number of visible fringes on the screen?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. In a double-slit experiment, if the distance to the screen is increased, what happens to the fringe separation?
  • A. Fringe separation decreases
  • B. Fringe separation increases
  • C. Fringe separation remains the same
  • D. Fringe separation becomes zero
Q. In a double-slit experiment, if the distance to the screen is increased, what happens to the interference pattern?
  • A. Fringe width decreases
  • B. Fringe width increases
  • C. Fringe pattern disappears
  • D. Fringe spacing remains unchanged
Q. In a double-slit experiment, if the distance to the screen is increased, what happens to the fringe pattern?
  • A. Fringe width decreases
  • B. Fringe width increases
  • C. Fringe pattern disappears
  • D. Fringe pattern becomes sharper
Q. In a double-slit experiment, if the intensity of light at the center of the fringe pattern is I0, what is the intensity at the first minimum?
  • A. 0
  • B. I0
  • C. I0/2
  • D. I0/4
Q. In a double-slit experiment, if the screen distance is increased, what happens to the fringe separation?
  • A. Fringe separation increases
  • B. Fringe separation decreases
  • C. Fringe separation remains the same
  • D. Fringe separation becomes zero
Q. In a double-slit experiment, if the screen is moved further away from the slits, what effect does this have on the fringe spacing?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. In a double-slit experiment, if the screen is moved further away from the slits, what happens to the fringe pattern?
  • A. Fringes become wider
  • B. Fringes become narrower
  • C. Fringe intensity increases
  • D. Fringe intensity decreases
Q. In a double-slit experiment, if the wavelength of light is 600 nm and the distance between the slits is 0.5 mm, what is the fringe width if the screen is 1 m away?
  • A. 0.12 mm
  • B. 0.3 mm
  • C. 0.6 mm
  • D. 0.5 mm
Q. In a double-slit experiment, if the wavelength of light is increased, what happens to the distance between the fringes?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. In a double-slit experiment, what happens to the interference pattern if the distance between the slits is increased?
  • A. Pattern becomes wider
  • B. Pattern becomes narrower
  • C. No change
  • D. Pattern disappears
Q. In a double-slit experiment, what is the effect of increasing the distance between the slits on the fringe width?
  • A. Fringe width increases
  • B. Fringe width decreases
  • C. Fringe width remains constant
  • D. Fringe width becomes zero
Q. In a dynamic equilibrium, which of the following statements is true?
  • A. The rates of the forward and reverse reactions are equal
  • B. The concentrations of reactants and products are equal
  • C. The reaction has stopped
  • D. The system is at rest
Q. In a family of 4 children, what is the probability that at least one is a girl given that there are at least 2 boys?
  • A. 1/2
  • B. 3/4
  • C. 1/4
  • D. 2/3
Q. In a family with 3 children, what is the probability that at least one child is a girl given that at least one child is a boy?
  • A. 0.75
  • B. 0.5
  • C. 0.25
  • D. 0.6
Q. In a first-order reaction, if the concentration of the reactant is halved, what happens to the half-life?
  • A. It doubles
  • B. It remains the same
  • C. It is halved
  • D. It becomes zero
Q. In a fluid at rest, the pressure at a depth h is given by which equation?
  • A. P = ρgh
  • B. P = ρg/h
  • C. P = ρg + h
  • D. P = gh/ρ
Q. In a fluid flowing through a pipe, what effect does increasing the temperature have on its viscosity?
  • A. Increases viscosity
  • B. Decreases viscosity
  • C. No effect
  • D. Depends on the fluid
Q. In a fluid flowing through a pipe, which factor does NOT affect the viscosity?
  • A. Temperature
  • B. Pressure
  • C. Fluid density
  • D. Fluid composition
Q. In a forced oscillation system, if the driving frequency is equal to the natural frequency, what phenomenon occurs?
  • A. Damping
  • B. Resonance
  • C. Phase shift
  • D. Destructive interference
Q. In a forced oscillation system, the driving frequency is 5 Hz and the natural frequency is 4 Hz. What is the ratio of the driving frequency to the natural frequency?
  • A. 0.8
  • B. 1
  • C. 1.25
  • D. 1.5
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