Q. What happens to the electric field inside a conductor in electrostatic equilibrium?
A.
It is zero
B.
It is constant
C.
It varies linearly
D.
It is maximum at the center
Show solution
Solution
In electrostatic equilibrium, the electric field inside a conductor is zero.
Correct Answer:
A
— It is zero
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Q. What happens to the electric field inside a conductor when it is in electrostatic equilibrium?
A.
It increases
B.
It decreases
C.
It becomes zero
D.
It remains constant
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Solution
In electrostatic equilibrium, the electric field inside a conductor is zero.
Correct Answer:
C
— It becomes zero
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Q. What happens to the electric field inside a conductor when it reaches electrostatic equilibrium?
A.
It becomes uniform
B.
It becomes zero
C.
It increases
D.
It decreases
Show solution
Solution
In electrostatic equilibrium, the electric field inside a conductor is zero.
Correct Answer:
B
— It becomes zero
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Q. What happens to the electric field strength if the distance from a point charge is tripled?
A.
It becomes one-third
B.
It becomes one-ninth
C.
It becomes three times
D.
It remains the same
Show solution
Solution
The electric field strength E ∝ 1/r², so if distance is tripled, the field strength becomes 1/9 of the original.
Correct Answer:
B
— It becomes one-ninth
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Q. What happens to the electric potential as you move away from a positive charge?
A.
Increases
B.
Decreases
C.
Remains constant
D.
Becomes negative
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Solution
The electric potential decreases as you move away from a positive charge.
Correct Answer:
B
— Decreases
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Q. What happens to the electric potential energy of a charge when it moves against an electric field?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It becomes zero
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Solution
When a charge moves against an electric field, its electric potential energy increases.
Correct Answer:
A
— It increases
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Q. What happens to the electric potential energy of a system of charges when they are brought closer together?
A.
Increases
B.
Decreases
C.
Remains constant
D.
Becomes zero
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Solution
The electric potential energy of a system of charges decreases when they are brought closer together, especially if they are of opposite signs.
Correct Answer:
B
— Decreases
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Q. What happens to the electric potential energy when two like charges are brought closer together?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
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Solution
The electric potential energy increases as like charges repel each other.
Correct Answer:
A
— Increases
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Q. What happens to the energy stored in a capacitor if the voltage across it is doubled?
A.
It doubles
B.
It quadruples
C.
It remains the same
D.
It halves
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Solution
The energy stored in a capacitor is given by U = 1/2 C V². If the voltage is doubled, the energy increases by a factor of four.
Correct Answer:
B
— It quadruples
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Q. What happens to the entropy of a system when it undergoes a reversible isothermal expansion?
A.
Increases
B.
Decreases
C.
Remains constant
D.
Depends on the gas
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Solution
During a reversible isothermal expansion, the entropy of the system increases as the gas expands and does work on the surroundings.
Correct Answer:
A
— Increases
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Q. What happens to the entropy of a system when it undergoes a reversible process?
A.
It decreases
B.
It remains constant
C.
It increases
D.
It can either increase or decrease
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Solution
In a reversible process, the total entropy of the system and surroundings remains constant.
Correct Answer:
B
— It remains constant
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Q. What happens to the entropy of a system when it undergoes a spontaneous process?
A.
It decreases
B.
It remains constant
C.
It increases
D.
It becomes zero
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Solution
In a spontaneous process, the entropy of a system increases.
Correct Answer:
C
— It increases
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Q. What happens to the entropy of an isolated system?
A.
It decreases
B.
It remains constant
C.
It increases
D.
It can either increase or decrease
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Solution
The second law of thermodynamics states that the entropy of an isolated system always increases.
Correct Answer:
C
— It increases
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Q. What happens to the Fermi level in a p-type semiconductor compared to an intrinsic semiconductor?
A.
Moves up
B.
Moves down
C.
Remains the same
D.
Becomes zero
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Solution
In a p-type semiconductor, the Fermi level moves up towards the valence band due to the increased hole concentration.
Correct Answer:
A
— Moves up
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Q. What happens to the focal length of a lens when it is immersed in a medium with a higher refractive index than the lens material?
A.
Focal length increases
B.
Focal length decreases
C.
Focal length remains the same
D.
Focal length becomes infinite
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Solution
When a lens is immersed in a medium with a higher refractive index, its effective focal length decreases due to the reduced refractive power.
Correct Answer:
B
— Focal length decreases
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Q. What happens to the focal length of a lens when it is immersed in water?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes infinite
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Solution
The focal length of a lens decreases when immersed in a medium with a higher refractive index than air.
Correct Answer:
B
— Decreases
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Q. What happens to the frequency of a damped oscillator as damping increases?
A.
Frequency increases
B.
Frequency decreases
C.
Frequency remains the same
D.
Frequency becomes zero
Show solution
Solution
As damping increases, the frequency of the damped oscillator decreases.
Correct Answer:
B
— Frequency decreases
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Q. What happens to the frequency of oscillation in a damped system compared to an undamped system?
A.
It increases
B.
It decreases
C.
It remains the same
D.
It becomes zero
Show solution
Solution
The frequency of oscillation in a damped system is lower than that of an undamped system due to energy loss.
Correct Answer:
B
— It decreases
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Q. What happens to the fringe pattern in Young's double-slit experiment if the distance to the screen is halved?
A.
Fringe width increases
B.
Fringe width decreases
C.
Fringe separation remains the same
D.
Fringe visibility decreases
Show solution
Solution
Fringe width (β) is inversely proportional to the distance to the screen (D). If D is halved, the fringe width decreases.
Correct Answer:
B
— Fringe width decreases
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Q. What happens to the galvanometer reading in a Wheatstone bridge when it is balanced?
A.
It shows maximum current
B.
It shows minimum current
C.
It shows zero current
D.
It shows fluctuating current
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Solution
When the Wheatstone bridge is balanced, the potential difference across the galvanometer is zero, resulting in zero current.
Correct Answer:
C
— It shows zero current
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Q. What happens to the gravitational force between two masses if one mass is tripled?
A.
It triples
B.
It doubles
C.
It remains the same
D.
It increases by a factor of 9
Show solution
Solution
The gravitational force is directly proportional to the product of the masses. If one mass is tripled, the force also triples.
Correct Answer:
A
— It triples
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Q. What happens to the gravitational force between two masses if the distance between them is tripled?
A.
It triples
B.
It becomes one-third
C.
It becomes one-ninth
D.
It remains the same
Show solution
Solution
The gravitational force is inversely proportional to the square of the distance. If the distance is tripled, the force becomes 1/(3^2) = 1/9 of the original force.
Correct Answer:
C
— It becomes one-ninth
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Q. What happens to the gravitational force between two objects if one object's mass is tripled?
A.
It triples
B.
It halves
C.
It remains the same
D.
It increases by a factor of 9
Show solution
Solution
The gravitational force is directly proportional to the product of the masses. If one mass is tripled, the force also triples.
Correct Answer:
A
— It triples
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Q. What happens to the gravitational force between two objects if the mass of one object is tripled?
A.
It becomes three times stronger
B.
It becomes six times stronger
C.
It becomes nine times stronger
D.
It remains the same
Show solution
Solution
The gravitational force is directly proportional to the product of the masses, so tripling one mass triples the force.
Correct Answer:
A
— It becomes three times stronger
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Q. What happens to the gravitational force if the mass of one object is tripled?
A.
It becomes three times stronger
B.
It becomes six times stronger
C.
It remains the same
D.
It becomes nine times stronger
Show solution
Solution
The gravitational force is directly proportional to the product of the masses, so tripling one mass triples the force.
Correct Answer:
A
— It becomes three times stronger
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Q. What happens to the gravitational force on a satellite as it moves further away from the Earth?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It becomes zero
Show solution
Solution
The gravitational force on a satellite decreases as it moves further away from the Earth, following the inverse square law.
Correct Answer:
B
— It decreases
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Q. What happens to the gravitational force on a satellite as it moves to a higher orbit?
A.
It increases.
B.
It decreases.
C.
It remains constant.
D.
It becomes zero.
Show solution
Solution
The gravitational force on a satellite decreases as it moves to a higher orbit due to the inverse square law of gravitation.
Correct Answer:
B
— It decreases.
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Q. What happens to the gravitational force on a satellite if its altitude is doubled?
A.
It doubles
B.
It remains the same
C.
It becomes four times weaker
D.
It becomes eight times weaker
Show solution
Solution
The gravitational force decreases with the square of the distance from the center of the Earth. If the altitude is doubled, the distance from the center of the Earth becomes R + 2h, and the force becomes weaker by a factor of four.
Correct Answer:
C
— It becomes four times weaker
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Q. What happens to the gravitational potential as you move away from a mass?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It oscillates
Show solution
Solution
The gravitational potential decreases as you move away from a mass.
Correct Answer:
B
— It decreases
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Q. What happens to the gravitational potential as you move away from a massive body?
A.
It increases
B.
It decreases
C.
It remains constant
D.
It oscillates
Show solution
Solution
The gravitational potential decreases as you move away from a massive body.
Correct Answer:
B
— It decreases
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Physics Syllabus (JEE Main) MCQ & Objective Questions
The Physics Syllabus for JEE Main is crucial for students aiming to excel in their exams. Understanding this syllabus not only helps in grasping fundamental concepts but also enhances problem-solving skills through practice. Engaging with MCQs and objective questions is essential for effective exam preparation, as it allows students to identify important questions and strengthen their knowledge base.
What You Will Practise Here
Mechanics: Laws of Motion, Work, Energy, and Power
Thermodynamics: Laws of Thermodynamics, Heat Transfer
Waves and Oscillations: Simple Harmonic Motion, Wave Properties
Electromagnetism: Electric Fields, Magnetic Fields, and Circuits
Optics: Reflection, Refraction, and Optical Instruments
Modern Physics: Quantum Theory, Atomic Models, and Nuclear Physics
Fluid Mechanics: Properties of Fluids, Bernoulli's Principle
Exam Relevance
The Physics Syllabus (JEE Main) is integral to various examinations, including CBSE, State Boards, and competitive exams like NEET and JEE. Questions often focus on conceptual understanding and application of theories. Common patterns include numerical problems, conceptual MCQs, and assertion-reason type questions, which test both knowledge and analytical skills.
Common Mistakes Students Make
Misinterpreting the question stem, leading to incorrect answers.
Neglecting units and dimensions in calculations.
Overlooking the significance of diagrams in understanding concepts.
Confusing similar concepts, such as velocity and acceleration.
Failing to apply formulas correctly in different contexts.
FAQs
Question: What are the key topics in the Physics Syllabus for JEE Main?Answer: Key topics include Mechanics, Thermodynamics, Waves, Electromagnetism, Optics, Modern Physics, and Fluid Mechanics.
Question: How can I improve my performance in Physics MCQs?Answer: Regular practice of MCQs, understanding concepts deeply, and revising important formulas can significantly enhance your performance.
Start solving practice MCQs today to test your understanding of the Physics Syllabus (JEE Main). This will not only boost your confidence but also prepare you effectively for your upcoming exams. Remember, consistent practice is the key to success!
