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. A cylindrical Gaussian surface encloses a long straight wire carrying a current. What is the electric field at a distance r from the wire?
  • A. 0
  • B. I/(2πε₀r)
  • C. λ/(2πε₀r)
  • D. σ/(2ε₀)
Q. A cylindrical Gaussian surface encloses a long straight wire carrying a current. What is the electric field at a point outside the cylinder?
  • A. Zero
  • B. Directly proportional to the distance from the wire
  • C. Inversely proportional to the distance from the wire
  • D. Constant
Q. A cylindrical Gaussian surface of length L and radius R encloses a charge Q uniformly distributed along its length. What is the electric field at a distance R from the axis of the cylinder?
  • A. Q/(2πε₀R)
  • B. Q/(4πε₀R²)
  • C. 0
  • D. Q/(ε₀L)
Q. A cylindrical Gaussian surface of length L and radius R encloses a charge Q. What is the electric field E at a distance R from the axis of the cylinder?
  • A. Q/(2πε₀R)
  • B. Q/(4πε₀R²)
  • C. Q/(ε₀L)
  • D. 0
Q. A cylindrical rod is subjected to a tensile force. If the diameter of the rod is doubled while keeping the length constant, what happens to the stress in the rod?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. A cylindrical rod is subjected to a tensile force. If the radius of the rod is halved while keeping the length constant, how does the tensile stress change?
  • A. It doubles
  • B. It halves
  • C. It quadruples
  • D. It remains the same
Q. A cylindrical wire has a length of 1 m and a radius of 0.5 mm. If its resistivity is 1.68 x 10^-8 Ω·m, what is its resistance?
  • A. 0.0212 Ω
  • B. 0.0424 Ω
  • C. 0.0848 Ω
  • D. 0.168 Ω
Q. A damped harmonic oscillator has a mass of 2 kg and a damping coefficient of 0.5 kg/s. What is the damping ratio if the spring constant is 8 N/m?
  • A. 0.25
  • B. 0.5
  • C. 1
  • D. 2
Q. A damped oscillator has a time constant of 3 seconds. What is the amplitude after 6 seconds if the initial amplitude is 10 m?
  • A. 2.5 m
  • B. 5 m
  • C. 7.5 m
  • D. 10 m
Q. A damped oscillator has a time constant of 3 seconds. What is the damping coefficient if the mass is 1 kg and the spring constant is 4 N/m?
  • A. 1.5 kg/s
  • B. 2 kg/s
  • C. 3 kg/s
  • D. 4 kg/s
Q. A diamond has a refractive index of 2.42. What is the critical angle for total internal reflection at the diamond-air interface?
  • A. 24.4°
  • B. 41.1°
  • C. 23.6°
  • D. 17.5°
Q. A die is rolled. What is the probability of getting a number greater than 4?
  • A. 1/6
  • B. 1/3
  • C. 1/2
  • D. 1/4
Q. A die is rolled. What is the probability of getting an even number given that the number rolled is greater than 2?
  • A. 1/2
  • B. 1/3
  • C. 2/3
  • D. 1/4
Q. A die is rolled. What is the probability of getting an even number?
  • A. 1/2
  • B. 1/3
  • C. 1/6
  • D. 2/3
Q. A die is rolled. What is the probability of rolling an even number given that the number rolled is greater than 2?
  • A. 1/2
  • B. 1/3
  • C. 1/4
  • D. 2/3
Q. A die is rolled. What is the probability of rolling an even number?
  • A. 1/2
  • B. 1/3
  • C. 1/6
  • D. 2/3
Q. A dipole consists of two charges +q and -q separated by a distance d. What is the expression for the dipole moment?
  • A. qd
  • B. q/d
  • C. q^2d
  • D. q/d^2
Q. A dipole consists of two charges +q and -q separated by a distance d. What is the dipole moment?
  • A. qd
  • B. q/d
  • C. q^2d
  • D. q/d^2
Q. A dipole consists of two equal and opposite charges separated by a distance of 0.1m. What is the dipole moment if each charge is 1μC?
  • A. 1 × 10^-7 C m
  • B. 1 × 10^-6 C m
  • C. 1 × 10^-5 C m
  • D. 1 × 10^-4 C m
Q. A dipole consists of two equal and opposite charges separated by a distance. What happens to the dipole moment if the distance is doubled?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. A dipole moment is defined as the product of charge and the distance between the charges. What is the dipole moment of a dipole consisting of charges +2μC and -2μC separated by 0.1m?
  • A. 4 × 10^-7 C m
  • B. 2 × 10^-7 C m
  • C. 2 × 10^-6 C m
  • D. 4 × 10^-6 C m
Q. A dipole moment p is placed in a uniform electric field E. What is the torque experienced by the dipole?
  • A. pE
  • B. pE sin θ
  • C. pE cos θ
  • D. 0
Q. A disc of mass M and radius R is rotating about its axis with an angular velocity ω. What is the angular momentum of the disc?
  • A. (1/2)MR^2ω
  • B. MR^2ω
  • C. MRω
  • D. (1/4)MR^2ω
Q. A disc of radius R and mass M is rotating about its axis with an angular velocity ω. What is its kinetic energy?
  • A. (1/2)Iω^2
  • B. (1/2)Mω^2
  • C. (1/2)M(R^2)ω^2
  • D. (1/2)(MR^2)ω^2
Q. A disc of radius R and mass M is rotating about its axis with an angular velocity ω. What is the kinetic energy of the disc?
  • A. (1/2)Iω^2
  • B. (1/2)Mω^2
  • C.
  • D. Mω^2
Q. A disc rolls without slipping on a horizontal surface. If its radius is R and it rolls with a linear speed v, what is its angular speed?
  • A. v/R
  • B. 2v/R
  • C. v/2R
  • D. v^2/R
Q. A disk and a ring of the same mass and radius are released from rest at the same height. Which one reaches the ground first?
  • A. Disk
  • B. Ring
  • C. Both reach at the same time
  • D. Depends on the surface
Q. A disk and a ring of the same mass and radius are rolling down an incline. Which one will have a greater translational speed at the bottom?
  • A. Disk
  • B. Ring
  • C. Both have the same speed
  • D. Cannot be determined
Q. A disk and a ring of the same mass and radius are rolling down an incline. Which will reach the bottom first?
  • A. Disk
  • B. Ring
  • C. Both will reach at the same time
  • D. Depends on the angle of incline
Q. A disk and a ring of the same mass and radius are rolling without slipping down an incline. Which one will have a greater translational speed at the bottom?
  • A. Disk
  • B. Ring
  • C. Both have the same speed
  • D. Depends on the incline
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