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. If the temperature of a gas is doubled, what happens to its RMS speed?
  • A. Increases by a factor of sqrt(2)
  • B. Increases by a factor of 2
  • C. Increases by a factor of sqrt(3)
  • D. Remains the same
Q. If the temperature of a gas is halved, what happens to its RMS speed?
  • A. Increases by sqrt(2)
  • B. Decreases by sqrt(2)
  • C. Remains the same
  • D. Decreases by 2
Q. If the temperature of a gas is increased at constant volume, what happens to the pressure?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Becomes zero
Q. If the temperature of a gas is increased from 200 K to 800 K, how does the RMS speed change?
  • A. Increases by 2
  • B. Increases by 4
  • C. Increases by sqrt(4)
  • D. Decreases by sqrt(4)
Q. If the temperature of a gas is increased from 300 K to 600 K, how does the RMS speed change?
  • A. It doubles
  • B. It increases by sqrt(2)
  • C. It increases by sqrt(3)
  • D. It remains the same
Q. If the temperature of a gas is increased while keeping the volume constant, what happens to the pressure?
  • A. Pressure decreases
  • B. Pressure increases
  • C. Pressure remains constant
  • D. Pressure becomes zero
Q. If the temperature of a liquid increases, what happens to its viscosity?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Varies unpredictably
Q. If the temperature of a material increases, what happens to its Young's modulus?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on the material
Q. If the temperature of a metallic conductor increases, what happens to its resistivity?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Becomes zero
Q. If the temperature of a system is increased, what happens to its entropy?
  • A. It decreases
  • B. It remains constant
  • C. It increases
  • D. It becomes zero
Q. If the temperature of an ideal gas is doubled at constant volume, what happens to the pressure?
  • A. It remains the same
  • B. It doubles
  • C. It triples
  • D. It quadruples
Q. If the temperature of an ideal gas is doubled at constant volume, what happens to the average kinetic energy of the gas molecules?
  • A. It remains the same.
  • B. It doubles.
  • C. It triples.
  • D. It halves.
Q. If the temperature of an ideal gas is doubled at constant volume, what happens to its pressure?
  • A. It halves
  • B. It remains the same
  • C. It doubles
  • D. It quadruples
Q. If the temperature of an ideal gas is doubled while keeping the pressure constant, what happens to its volume?
  • A. It halves
  • B. It doubles
  • C. It remains the same
  • D. It quadruples
Q. If the temperature of an ideal gas is doubled while keeping the volume constant, what happens to the pressure?
  • A. It remains the same.
  • B. It doubles.
  • C. It triples.
  • D. It halves.
Q. If the temperature of an object increases, what happens to the rate of heat radiation from that object?
  • A. Decreases
  • B. Increases
  • C. Remains constant
  • D. Becomes zero
Q. If the temperature of an object increases, what happens to the rate of heat transfer by radiation?
  • A. Decreases
  • B. Increases
  • C. Remains constant
  • D. Becomes zero
Q. If the temperature of an object is doubled, how does its thermal radiation change according to the Stefan-Boltzmann law?
  • A. It doubles
  • B. It quadruples
  • C. It remains the same
  • D. It increases eightfold
Q. If the temperature of an object is doubled, how does the rate of heat radiation change?
  • A. It doubles
  • B. It quadruples
  • C. It remains the same
  • D. It halves
Q. If the torque is doubled while keeping the distance constant, what happens to the force applied?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If the torque on a rotating object is doubled while the radius remains constant, what happens to the force applied?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If the torque on an object is zero, what can be said about the forces acting on it?
  • A. The object is at rest.
  • B. The net force is zero.
  • C. The forces are balanced.
  • D. The forces are acting along the same line.
Q. If the torque on an object is zero, which of the following must be true?
  • A. The net force is zero.
  • B. The object is at rest.
  • C. The forces are balanced.
  • D. The line of action of the forces passes through the pivot.
Q. If the total charge enclosed by a Gaussian surface is zero, what can be said about the electric field on that surface?
  • A. It is zero everywhere
  • B. It can be non-zero
  • C. It is constant
  • D. It is infinite
Q. If the total energy of a simple harmonic oscillator is 50 J and the mass is 2 kg, what is the maximum speed of the mass?
  • A. 5 m/s
  • B. 10 m/s
  • C. 15 m/s
  • D. 20 m/s
Q. If the total resistance in a Wheatstone bridge is 30Ω and the bridge is balanced, what is the current through the galvanometer?
  • A. 0A
  • B. 1A
  • C. 2A
  • D. Depends on the voltage
Q. If the total resistance in a Wheatstone bridge is increased, what happens to the current in the circuit?
  • A. It increases
  • B. It decreases
  • C. It remains the same
  • D. It becomes zero
Q. If the true value of a measurement is 50 and the measured value is 48, what is the absolute error?
  • A. 2
  • B. 48
  • C. 50
  • D. 52
Q. If the true value of a measurement is 50.0 cm and a student records a value of 49.5 cm, what is the absolute error?
  • A. 0.5 cm
  • B. 0.0 cm
  • C. 0.5 m
  • D. 1.0 cm
Q. If the true value of a measurement is 50.0 cm and the measured value is 49.5 cm, what is the absolute error?
  • A. 0.5 cm
  • B. 1.0 cm
  • C. 0.1 cm
  • D. 0.2 cm
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