Physics Syllabus (JEE Main)

Current Electricity Electrostatics Gravitation Kinematics Kinetic Theory of Gases Laws of Motion Magnetism & EMI Modern Physics Optics Oscillations & Waves Properties of Matter Rotational Motion Thermodynamics Units & Measurement Work, Energy & Power

Q. If a 10 kg object is dropped from a height of 20 m, what is its potential energy at the top? (1960)

A. 200 J
B. 1000 J
C. 500 J
D. 1500 J

Solution

Potential Energy (PE) = m * g * h = 10 kg * 9.8 m/s^2 * 20 m = 1960 J

Correct Answer: B — 1000 J

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Q. If a 10 kg object is dropped from a height of 5 m, what is the potential energy at that height?

A. 50 J
B. 100 J
C. 150 J
D. 200 J

Solution

Potential energy = mgh = 10 kg × 9.8 m/s² × 5 m = 490 J.

Correct Answer: B — 100 J

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Q. If a 10 kg object is in free fall, what is the force acting on it due to gravity?

A. 10 N
B. 20 N
C. 30 N
D. 40 N

Solution

The force due to gravity is F = mg = 10 kg * 9.8 m/s² = 98 N, which rounds to 100 N.

Correct Answer: B — 20 N

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Q. If a 10 kg object is moving with a velocity of 4 m/s, what is its kinetic energy?

A. 80 J
B. 40 J
C. 20 J
D. 160 J

Solution

Kinetic Energy (KE) = 1/2 * m * v^2 = 1/2 * 10 * (4^2) = 80 J

Correct Answer: A — 80 J

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Q. If a 10 kg object is pulled with a force of 30 N, what is its acceleration?

A. 1 m/s²
B. 2 m/s²
C. 3 m/s²
D. 4 m/s²

Solution

Using F = ma, acceleration a = F/m = 30 N / 10 kg = 3 m/s².

Correct Answer: C — 3 m/s²

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Q. If a 10 kg object is pulled with a force of 50 N, what is its acceleration?

A. 2 m/s²
B. 5 m/s²
C. 10 m/s²
D. 20 m/s²

Solution

Using F = ma, a = F/m = 50 N / 10 kg = 5 m/s².

Correct Answer: B — 5 m/s²

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Q. If a 10 kg object is subjected to a net force of 30 N, what is the object's acceleration?

A. 3 m/s²
B. 2 m/s²
C. 1.5 m/s²
D. 4 m/s²

Solution

Using F = ma, a = F/m = 30 N / 10 kg = 3 m/s².

Correct Answer: A — 3 m/s²

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Q. If a 10 kg object is subjected to a net force of 30 N, what will be its acceleration?

A. 3 m/s²
B. 0.3 m/s²
C. 30 m/s²
D. 300 m/s²

Solution

Using F = ma, acceleration a = F/m = 30 N / 10 kg = 3 m/s².

Correct Answer: A — 3 m/s²

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Q. If a 10 kg object is subjected to a net force of 50 N, what is its acceleration?

A. 2 m/s²
B. 5 m/s²
C. 10 m/s²
D. 15 m/s²

Solution

Using F = ma, acceleration a = F/m = 50 N / 10 kg = 5 m/s².

Correct Answer: B — 5 m/s²

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Q. If a 10 kg object is subjected to a net force of 50 N, what will be its acceleration?

A. 2 m/s²
B. 5 m/s²
C. 10 m/s²
D. 20 m/s²

Solution

Using F = ma, acceleration a = F/m = 50 N / 10 kg = 5 m/s².

Correct Answer: B — 5 m/s²

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Q. If a 10 ohm resistor is connected to a 20V battery, what is the energy consumed in 5 seconds?

A. 20 J
B. 40 J
C. 10 J
D. 50 J

Solution

Power P = V^2 / R = 20^2 / 10 = 40 W. Energy = Power * time = 40 W * 5 s = 200 J.

Correct Answer: B — 40 J

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Q. If a 10 ohm resistor is connected to a 30V battery, what is the energy consumed in 5 seconds?

A. 15 J
B. 30 J
C. 75 J
D. 150 J

Solution

Power P = V^2 / R = (30V)^2 / 10 ohms = 90 W. Energy = Power * Time = 90 W * 5 s = 450 J.

Correct Answer: C — 75 J

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Q. If a 1000 kg car accelerates from rest to a speed of 20 m/s in 10 seconds, what is the average power output of the car's engine?

A. 2000 W
B. 4000 W
C. 6000 W
D. 8000 W

Solution

First, calculate the work done: W = 0.5 * m * v^2 = 0.5 * 1000 kg * (20 m/s)^2 = 200000 J. Then, power is P = W/t = 200000 J / 10 s = 20000 W.

Correct Answer: C — 6000 W

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Q. If a 1000 W heater is used for 3 hours, how much energy does it consume in kilowatt-hours?

A. 3 kWh
B. 2 kWh
C. 1 kWh
D. 0.5 kWh

Solution

Energy consumed in kilowatt-hours is calculated as E = P (kW) * t (h). Here, P = 1000 W = 1 kW and t = 3 hours. Thus, E = 1 kW * 3 h = 3 kWh.

Correct Answer: A — 3 kWh

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Q. If a 1000 W heater runs for 2 hours, how much energy does it consume?

A. 7200 J
B. 14400 J
C. 20000 J
D. 3600000 J

Solution

Energy = Power × Time = 1000 W × (2 × 3600 s) = 7200000 J.

Correct Answer: D — 3600000 J

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Q. If a 10Ω resistor is connected to a 20V battery, what is the power dissipated by the resistor?

A. 20W
B. 40W
C. 100W
D. 200W

Solution

Power (P) can be calculated using P = V^2/R. Here, P = 20V^2 / 10Ω = 400 / 10 = 40W.

Correct Answer: B — 40W

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Q. If a 10Ω resistor is connected to a 20V source, what is the energy consumed in 5 seconds?

A. 20J
B. 40J
C. 50J
D. 100J

Solution

Power P = V^2 / R = 20V^2 / 10Ω = 40W. Energy = Power * time = 40W * 5s = 200J.

Correct Answer: B — 40J

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Q. If a 12 kg object is moving with a constant velocity, what can be said about the net force acting on it?

A. It is zero
B. It is equal to its weight
C. It is equal to the applied force
D. It is increasing

Solution

An object moving with constant velocity has a net force of zero according to Newton's first law.

Correct Answer: A — It is zero

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Q. If a 12 kg object is pushed with a force of 48 N, what is the acceleration of the object?

A. 2 m/s²
B. 4 m/s²
C. 6 m/s²
D. 8 m/s²

Solution

Using F = ma, acceleration a = F/m = 48 N / 12 kg = 4 m/s².

Correct Answer: B — 4 m/s²

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Q. If a 12V battery is connected across a 4 ohm resistor, what is the current flowing through the resistor?

A. 2 A
B. 3 A
C. 4 A
D. 6 A

Solution

Using Ohm's law, I = V/R = 12V / 4Ω = 3 A.

Correct Answer: A — 2 A

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Q. If a 12V battery is connected across a 4 ohm resistor, what is the power dissipated in the resistor?

A. 12 W
B. 24 W
C. 36 W
D. 48 W

Solution

Power (P) can be calculated using P = V^2 / R = 12V^2 / 4Ω = 144 / 4 = 36 W.

Correct Answer: B — 24 W

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Q. If a 12V battery is connected across a 4Ω resistor, what is the current flowing through the resistor?

A. 3A
B. 2A
C. 4A
D. 1A

Solution

Using Ohm's law, I = V/R = 12V / 4Ω = 3A.

Correct Answer: B — 2A

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Q. If a 12V battery is connected to a 4 ohm resistor, what is the power dissipated by the resistor?

A. 12 W
B. 24 W
C. 36 W
D. 48 W

Solution

Power (P) can be calculated using P = V^2 / R = 12V^2 / 4Ω = 36 W.

Correct Answer: B — 24 W

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Q. If a 2 kg object is acted upon by a net force of 6 N, what is the object's acceleration?

A. 2 m/s²
B. 3 m/s²
C. 4 m/s²
D. 5 m/s²

Solution

Using F = ma, we find a = F/m = 6 N / 2 kg = 3 m/s².

Correct Answer: B — 3 m/s²

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Q. If a 2 kg object is dropped from a height of 5 m, what is its speed just before it hits the ground? (g = 10 m/s²)

A. 10 m/s
B. 5 m/s
C. 15 m/s
D. 20 m/s

Solution

Using energy conservation: PE_initial = KE_final; m * g * h = 1/2 * m * v^2; v = sqrt(2gh) = sqrt(2 * 10 * 5) = 10 m/s

Correct Answer: A — 10 m/s

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Q. If a 2 kg object is dropped from a height of 5 m, what is its velocity just before it hits the ground? (g = 10 m/s²)

A. 10 m/s
B. 5 m/s
C. 15 m/s
D. 20 m/s

Solution

Using energy conservation, v = sqrt(2gh) = sqrt(2 * 10 * 5) = 10 m/s

Correct Answer: A — 10 m/s

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Q. If a 2 kg object is moving with a velocity of 3 m/s and a force of 6 N is applied in the opposite direction, what will be its final velocity after 2 seconds?

A. 0 m/s
B. 1 m/s
C. 2 m/s
D. 3 m/s

Solution

Net force = -6 N, acceleration = F/m = -6 N / 2 kg = -3 m/s². Final velocity = initial velocity + at = 3 m/s + (-3 m/s² * 2 s) = 0 m/s.

Correct Answer: B — 1 m/s

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Q. If a 2 kg object is pulled with a force of 10 N and experiences a frictional force of 4 N, what is its acceleration?

A. 3 m/s²
B. 5 m/s²
C. 2 m/s²
D. 1 m/s²

Solution

Net force = applied force - friction = 10 N - 4 N = 6 N. Acceleration a = F/m = 6 N / 2 kg = 3 m/s².

Correct Answer: A — 3 m/s²

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Q. If a 2 kg object is subjected to a net force of 6 N, what is its acceleration?

A. 2 m/s²
B. 3 m/s²
C. 4 m/s²
D. 5 m/s²

Solution

Using F = ma, we have a = F/m = 6 N / 2 kg = 3 m/s².

Correct Answer: B — 3 m/s²

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Q. If a 3 kg object is in free fall, what is the force acting on it due to gravity?

A. 3 N
B. 9 N
C. 30 N
D. None of the above

Solution

Force due to gravity F = mg = 3 kg * 9.8 m/s² = 29.4 N, approximately 9 N for simplification.

Correct Answer: B — 9 N

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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!

Physics Syllabus (JEE Main)

Physics Syllabus (JEE Main) MCQ & Objective Questions

What You Will Practise Here

Exam Relevance

Common Mistakes Students Make

FAQs

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