Q. In a series circuit with a 12V battery and two resistors of 3Ω and 6Ω, what is the current flowing through the circuit?
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Solution
Total resistance R = R1 + R2 = 3Ω + 6Ω = 9Ω. Current I = V/R = 12V/9Ω = 4/3A.
Correct Answer:
B
— 2A
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Q. In a series circuit with a 12V battery and two resistors of 4Ω and 8Ω, what is the current flowing through the circuit?
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Solution
Total resistance R = R1 + R2 = 4Ω + 8Ω = 12Ω; I = V / R = 12V / 12Ω = 1A.
Correct Answer:
B
— 2A
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Q. In a series circuit, if one resistor fails (opens), what happens to the current in the circuit?
A.
It increases
B.
It decreases
C.
It becomes zero
D.
It remains the same
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Solution
In a series circuit, if one resistor fails, the circuit is broken and the current becomes zero.
Correct Answer:
C
— It becomes zero
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Q. In a series circuit, if one resistor fails open, what happens to the current in the circuit?
A.
It increases
B.
It decreases
C.
It becomes zero
D.
It remains the same
Show solution
Solution
In a series circuit, if one resistor fails open, the current becomes zero because the circuit is broken.
Correct Answer:
C
— It becomes zero
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Q. In a series circuit, if one resistor has a resistance of 5 Ω and another has 10 Ω, what is the total resistance?
A.
5 Ω
B.
10 Ω
C.
15 Ω
D.
20 Ω
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Solution
In a series circuit, total resistance R_total = R1 + R2 = 5 Ω + 10 Ω = 15 Ω.
Correct Answer:
C
— 15 Ω
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Q. In a series circuit, if one resistor has a resistivity of 5 Ω·m and another has 10 Ω·m, what is the total resistance?
A.
5 Ω
B.
10 Ω
C.
15 Ω
D.
20 Ω
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Solution
In series, total resistance R_total = R1 + R2 = 5 + 10 = 15 Ω.
Correct Answer:
C
— 15 Ω
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Q. In a series circuit, if one resistor is removed, what happens to the total resistance?
A.
It increases.
B.
It decreases.
C.
It remains the same.
D.
It becomes zero.
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Solution
In a series circuit, removing a resistor decreases the total resistance because the total resistance is the sum of all resistances.
Correct Answer:
B
— It decreases.
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Q. In a series RLC circuit, at resonance, what is the relationship between inductive reactance and capacitive reactance?
A.
X_L > X_C
B.
X_L < X_C
C.
X_L = X_C
D.
X_L + X_C = 0
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Solution
At resonance in a series RLC circuit, the inductive reactance (X_L) equals the capacitive reactance (X_C), hence X_L = X_C.
Correct Answer:
C
— X_L = X_C
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Q. In a series RLC circuit, if the resistance is increased, what happens to the bandwidth?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
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Solution
In a series RLC circuit, increasing the resistance decreases the bandwidth because the quality factor (Q) is inversely proportional to resistance.
Correct Answer:
B
— Decreases
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Q. In a series RLC circuit, if the resistance is increased, what happens to the bandwidth of the resonance peak?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
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Solution
Increasing the resistance in a series RLC circuit decreases the bandwidth of the resonance peak.
Correct Answer:
B
— Decreases
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Q. In a series RLC circuit, if the resistance is increased, what happens to the bandwidth of the resonance?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
Show solution
Solution
Increasing the resistance in a series RLC circuit decreases the bandwidth of the resonance because the quality factor (Q) is inversely proportional to resistance.
Correct Answer:
B
— Decreases
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Q. In a series RLC circuit, what happens to the current at resonance?
A.
Maximum
B.
Minimum
C.
Zero
D.
Constant
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Solution
At resonance, the current is maximum in a series RLC circuit.
Correct Answer:
A
— Maximum
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Q. In a series RLC circuit, what happens to the current when the frequency is increased beyond the resonant frequency?
A.
Increases
B.
Decreases
C.
Remains constant
D.
Becomes zero
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Solution
Beyond the resonant frequency, the circuit becomes more inductive, causing the current to decrease.
Correct Answer:
B
— Decreases
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Q. In a series RLC circuit, what happens to the total impedance at resonance?
A.
It is minimum
B.
It is maximum
C.
It is equal to R
D.
It is equal to XL + XC
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Solution
At resonance in a series RLC circuit, the total impedance (Z) is equal to the resistance (R) because the inductive and capacitive reactances cancel each other out.
Correct Answer:
C
— It is equal to R
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Q. In a series RLC circuit, what is the condition for resonance?
A.
R = 0
B.
L = C
C.
ωL = 1/ωC
D.
V = I
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Solution
The condition for resonance in a series RLC circuit is ωL = 1/ωC.
Correct Answer:
C
— ωL = 1/ωC
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Q. In a shear stress-strain relationship, what does the slope of the linear portion represent?
A.
Young's modulus
B.
Shear modulus
C.
Bulk modulus
D.
Tensile strength
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Solution
The slope of the linear portion of the shear stress-strain curve represents the shear modulus of the material.
Correct Answer:
B
— Shear modulus
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Q. In a simple harmonic motion, if the amplitude is halved, how does the total energy change?
A.
Remains the same
B.
Halves
C.
Doubles
D.
Quadruples
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Solution
Total energy E is proportional to the square of the amplitude. If amplitude is halved, energy is reduced to 1/4, hence it halves.
Correct Answer:
B
— Halves
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Q. In a simple harmonic motion, if the amplitude is increased, what happens to the total energy of the system?
A.
It decreases
B.
It remains the same
C.
It increases
D.
It becomes zero
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Solution
The total energy in simple harmonic motion is proportional to the square of the amplitude. If the amplitude increases, the total energy increases.
Correct Answer:
C
— It increases
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Q. In a simple harmonic motion, if the displacement is given by x(t) = A cos(ωt + φ), what is the phase constant φ?
A.
0
B.
π/2
C.
π
D.
Depends on initial conditions
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Solution
The phase constant φ depends on the initial conditions of the motion, such as the initial position and velocity.
Correct Answer:
D
— Depends on initial conditions
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Q. In a simple harmonic motion, if the mass is increased while keeping the spring constant constant, what happens to the period?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Doubles
Show solution
Solution
The period (T) increases with mass (T = 2π√(m/k)).
Correct Answer:
A
— Increases
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Q. In a simple harmonic motion, if the mass is increased, what happens to the period?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Depends on the spring constant
Show solution
Solution
The period T is given by T = 2π√(m/k). If m increases, T increases.
Correct Answer:
A
— Increases
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Q. In a simple harmonic motion, the maximum displacement from the mean position is called?
A.
Amplitude
B.
Frequency
C.
Wavelength
D.
Period
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Solution
The maximum displacement from the mean position in simple harmonic motion is called Amplitude.
Correct Answer:
A
— Amplitude
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Q. In a simple harmonic motion, the maximum displacement from the mean position is called what?
A.
Amplitude
B.
Frequency
C.
Wavelength
D.
Period
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Solution
The maximum displacement from the mean position in simple harmonic motion is called the amplitude.
Correct Answer:
A
— Amplitude
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Q. In a simple harmonic motion, the phase difference between displacement and acceleration is:
A.
0 degrees
B.
90 degrees
C.
180 degrees
D.
270 degrees
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Solution
Acceleration is always opposite to displacement in SHM, hence 180 degrees.
Correct Answer:
C
— 180 degrees
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Q. In a simple harmonic motion, the restoring force is directly proportional to what?
A.
Displacement
B.
Velocity
C.
Acceleration
D.
Mass
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Solution
In SHM, the restoring force is directly proportional to the displacement from the mean position.
Correct Answer:
A
— Displacement
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Q. In a simple harmonic motion, the restoring force is directly proportional to which of the following?
A.
Displacement
B.
Velocity
C.
Acceleration
D.
Mass
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Solution
In simple harmonic motion, the restoring force is directly proportional to the displacement from the mean position.
Correct Answer:
A
— Displacement
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Q. In a simple harmonic motion, the velocity is maximum at which point?
A.
Mean position
B.
Amplitude
C.
Equilibrium position
D.
None of the above
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Solution
The velocity is maximum at the mean position where the displacement is zero.
Correct Answer:
A
— Mean position
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Q. In a simple harmonic motion, what is the relationship between the period and the mass of the oscillating object?
A.
Directly proportional
B.
Inversely proportional
C.
Independent
D.
Exponential
Show solution
Solution
In simple harmonic motion, the period is independent of mass for a given spring constant, but for a pendulum, it is independent of mass.
Correct Answer:
B
— Inversely proportional
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Q. In a simple harmonic oscillator, if the mass is increased while keeping the spring constant the same, what happens to the period?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Doubles
Show solution
Solution
The period T = 2π√(m/k) increases with an increase in mass (m).
Correct Answer:
A
— Increases
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Q. In a simple harmonic oscillator, if the maximum speed is 4 m/s and the amplitude is 2 m, what is the angular frequency?
A.
2 rad/s
B.
4 rad/s
C.
6 rad/s
D.
8 rad/s
Show solution
Solution
Maximum speed (v_max) = ωA. Thus, ω = v_max/A = 4/2 = 2 rad/s.
Correct Answer:
B
— 4 rad/s
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Showing 2701 to 2730 of 5000 (167 Pages)
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!
