Major Competitive Exams MCQ & Objective Questions
Major Competitive Exams play a crucial role in shaping the academic and professional futures of students in India. These exams not only assess knowledge but also test problem-solving skills and time management. Practicing MCQs and objective questions is essential for scoring better, as they help in familiarizing students with the exam format and identifying important questions that frequently appear in tests.
What You Will Practise Here
Key concepts and theories related to major subjects
Important formulas and their applications
Definitions of critical terms and terminologies
Diagrams and illustrations to enhance understanding
Practice questions that mirror actual exam patterns
Strategies for solving objective questions efficiently
Time management techniques for competitive exams
Exam Relevance
The topics covered under Major Competitive Exams are integral to various examinations such as CBSE, State Boards, NEET, and JEE. Students can expect to encounter a mix of conceptual and application-based questions that require a solid understanding of the subjects. Common question patterns include multiple-choice questions that test both knowledge and analytical skills, making it essential to be well-prepared with practice MCQs.
Common Mistakes Students Make
Rushing through questions without reading them carefully
Overlooking the negative marking scheme in MCQs
Confusing similar concepts or terms
Neglecting to review previous years’ question papers
Failing to manage time effectively during the exam
FAQs
Question: How can I improve my performance in Major Competitive Exams?Answer: Regular practice of MCQs and understanding key concepts will significantly enhance your performance.
Question: What types of questions should I focus on for these exams?Answer: Concentrate on important Major Competitive Exams questions that frequently appear in past papers and mock tests.
Question: Are there specific strategies for tackling objective questions?Answer: Yes, practicing under timed conditions and reviewing mistakes can help develop effective strategies.
Start your journey towards success by solving practice MCQs today! Test your understanding and build confidence for your upcoming exams. Remember, consistent practice is the key to mastering Major Competitive Exams!
Q. What is the effect of increasing the temperature on the resistance of the potentiometer wire?
A.
Resistance decreases
B.
Resistance increases
C.
Resistance remains constant
D.
Resistance fluctuates
Show solution
Solution
Increasing the temperature generally increases the resistance of the potentiometer wire due to the increased vibrations of the atoms in the conductor.
Correct Answer:
B
— Resistance increases
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Q. What is the effect of increasing the temperature on the RMS speed of a gas?
A.
Increases
B.
Decreases
C.
Remains constant
D.
Depends on pressure
Show solution
Solution
Increasing the temperature increases the RMS speed, as v_rms is proportional to the square root of temperature.
Correct Answer:
A
— Increases
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Q. What is the effect of increasing the temperature on the solubility of most solid solutes in water? (2023)
A.
Increases solubility
B.
Decreases solubility
C.
No effect
D.
Depends on the solute
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Solution
For most solid solutes, increasing the temperature increases their solubility in water.
Correct Answer:
A
— Increases solubility
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Q. What is the effect of increasing the temperature on the speed of gas molecules?
A.
Speed decreases
B.
Speed remains constant
C.
Speed increases
D.
Speed becomes zero
Show solution
Solution
Increasing the temperature of a gas increases the average kinetic energy of the molecules, which in turn increases their speed.
Correct Answer:
C
— Speed increases
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Q. What is the effect of increasing the tension in a string on the speed of a wave traveling along it?
A.
Speed decreases
B.
Speed increases
C.
Speed remains constant
D.
Speed becomes zero
Show solution
Solution
Increasing the tension in a string increases the speed of the wave, as speed is proportional to the square root of tension.
Correct Answer:
B
— Speed increases
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Q. What is the effect of increasing the tension in a string on the speed of a wave traveling through it?
A.
Increases speed
B.
Decreases speed
C.
No effect
D.
Depends on the mass
Show solution
Solution
Increasing the tension in a string increases the speed of the wave traveling through it, as speed is proportional to the square root of tension.
Correct Answer:
A
— Increases speed
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Q. What is the effect of increasing the transmission power in a communication system?
A.
Increased range
B.
Decreased noise
C.
Higher bandwidth
D.
Lower distortion
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Solution
Increasing the transmission power generally increases the range of the communication system.
Correct Answer:
A
— Increased range
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Q. What is the effect of increasing the voltage in a circuit with constant resistance? (2019)
A.
Current decreases
B.
Current increases
C.
Current remains the same
D.
Resistance increases
Show solution
Solution
Increasing the voltage while keeping resistance constant will increase the current.
Correct Answer:
B
— Current increases
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Q. What is the effect of increasing the voltage in a circuit? (2020)
A.
Increases current
B.
Decreases resistance
C.
Increases resistance
D.
Decreases current
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Solution
Increasing the voltage in a circuit increases the current, according to Ohm's Law.
Correct Answer:
A
— Increases current
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Q. What is the effect of increasing the wavelength of incident light on the photoelectric effect?
A.
More electrons are emitted
B.
Fewer electrons are emitted
C.
The kinetic energy of emitted electrons increases
D.
The work function decreases
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Solution
Increasing the wavelength decreases the frequency of the incident light, which can lead to fewer or no electrons being emitted if the frequency falls below the threshold frequency.
Correct Answer:
B
— Fewer electrons are emitted
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Q. What is the effect of increasing the wavelength of incident light on the photoelectric current?
A.
It increases the current
B.
It decreases the current
C.
It has no effect
D.
It stops the current
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Solution
Increasing the wavelength decreases the frequency, which may fall below the threshold frequency, thus decreasing or stopping the current.
Correct Answer:
B
— It decreases the current
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Q. What is the effect of increasing the wavelength of light in a diffraction grating experiment?
A.
Fringe spacing decreases
B.
Fringe spacing increases
C.
No effect on fringe spacing
D.
Fringe intensity increases
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Solution
Increasing the wavelength of light increases the fringe spacing in a diffraction grating experiment.
Correct Answer:
B
— Fringe spacing increases
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Q. What is the effect of increasing the wavelength of light in a diffraction pattern?
A.
Fringe spacing decreases
B.
Fringe spacing increases
C.
No effect on fringe spacing
D.
Fringe intensity increases
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Solution
Increasing the wavelength of light increases the fringe spacing in a diffraction pattern.
Correct Answer:
B
— Fringe spacing increases
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Q. What is the effect of increasing the wavelength of light in a double-slit diffraction experiment?
A.
Fringe separation decreases
B.
Fringe separation increases
C.
No effect on fringe separation
D.
Fringe visibility decreases
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Solution
Increasing the wavelength increases the fringe separation, as it is directly proportional to the wavelength.
Correct Answer:
B
— Fringe separation increases
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Q. What is the effect of increasing the wavelength of light in a double-slit experiment?
A.
Fringe width decreases
B.
Fringe width increases
C.
Fringe separation remains unchanged
D.
No effect on interference pattern
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Solution
Increasing the wavelength (λ) increases the fringe width (β), as β is directly proportional to λ.
Correct Answer:
B
— Fringe width increases
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Q. What is the effect of increasing the wavelength of light in a double-slit experiment on the fringe separation?
A.
Fringe separation decreases
B.
Fringe separation increases
C.
Fringe separation remains the same
D.
Fringe separation becomes zero
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Solution
Fringe separation is directly proportional to the wavelength; increasing the wavelength increases the fringe separation.
Correct Answer:
B
— Fringe separation increases
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Q. What is the effect of increasing the wavelength of light on the angle of refraction when it passes from air into glass? (2023)
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
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Solution
Increasing the wavelength of light decreases the angle of refraction when passing from air into glass due to the dispersion of light.
Correct Answer:
B
— Decreases
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Q. What is the effect of increasing the wavelength of light on the diffraction pattern produced by a single slit?
A.
The pattern becomes sharper
B.
The pattern becomes broader
C.
The pattern remains unchanged
D.
The pattern disappears
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Solution
Increasing the wavelength results in a broader diffraction pattern due to increased spreading of the waves.
Correct Answer:
B
— The pattern becomes broader
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Q. What is the effect of increasing the wavelength of light on the diffraction pattern? (2019)
A.
Increases fringe width
B.
Decreases fringe width
C.
No effect
D.
Increases intensity
Show solution
Solution
Increasing the wavelength of light increases the fringe width in a diffraction pattern.
Correct Answer:
A
— Increases fringe width
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Q. What is the effect of increasing the wavelength of light on the fringe separation in a double-slit experiment?
A.
Increases
B.
Decreases
C.
No effect
D.
Depends on slit separation
Show solution
Solution
Fringe separation β = λD/d. Increasing λ increases β, hence fringe separation increases.
Correct Answer:
A
— Increases
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Q. What is the effect of increasing the wavelength of light used in a double-slit experiment on the fringe separation?
A.
Fringe separation decreases
B.
Fringe separation increases
C.
Fringe separation remains the same
D.
Fringe separation becomes zero
Show solution
Solution
Increasing the wavelength (λ) increases the fringe separation (β), as β is directly proportional to λ.
Correct Answer:
B
— Fringe separation increases
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Q. What is the effect of increasing the wavelength on the diffraction pattern of a single slit?
A.
Fringes become narrower
B.
Fringes become wider
C.
Fringes disappear
D.
Fringes become brighter
Show solution
Solution
Increasing the wavelength results in wider fringes in the diffraction pattern, as the angular width of the central maximum increases.
Correct Answer:
B
— Fringes become wider
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Q. What is the effect of increasing the wavelength on the diffraction pattern?
A.
Fringes become narrower
B.
Fringes become wider
C.
No effect
D.
Fringes disappear
Show solution
Solution
Increasing the wavelength results in wider fringes in the diffraction pattern, as fringe width is directly proportional to the wavelength.
Correct Answer:
B
— Fringes become wider
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Q. What is the effect of increasing the work function of a metal on the photoelectric effect?
A.
More electrons are emitted
B.
Fewer electrons are emitted
C.
The frequency of light must be increased
D.
Both B and C are correct
Show solution
Solution
Increasing the work function means that a higher frequency of light is required to emit electrons, resulting in fewer electrons being emitted for a given frequency of light.
Correct Answer:
D
— Both B and C are correct
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Q. What is the effect of inserting a dielectric material between the plates of a capacitor?
A.
Increases capacitance
B.
Decreases capacitance
C.
No effect on capacitance
D.
Changes the voltage across the plates
Show solution
Solution
Inserting a dielectric material increases the capacitance of the capacitor by a factor equal to the dielectric constant of the material.
Correct Answer:
A
— Increases capacitance
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Q. What is the effect of introducing a dielectric material between the plates of a capacitor? (2019)
A.
Increases capacitance
B.
Decreases capacitance
C.
No effect
D.
Increases resistance
Show solution
Solution
Introducing a dielectric material increases the capacitance of a capacitor by reducing the electric field between the plates.
Correct Answer:
A
— Increases capacitance
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Q. What is the effect of magnesium deficiency in plants? (2022)
A.
Stunted growth
B.
Leaf curling
C.
Chlorosis
D.
Wilting
Show solution
Solution
Magnesium deficiency leads to chlorosis, particularly in older leaves, as it is a key component of chlorophyll.
Correct Answer:
C
— Chlorosis
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Q. What is the effect of multiplying a function by a negative constant on its graph?
A.
It reflects the graph across the x-axis.
B.
It reflects the graph across the y-axis.
C.
It shifts the graph to the left.
D.
It stretches the graph vertically.
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Solution
Multiplying a function by a negative constant reflects the graph across the x-axis.
Correct Answer:
A
— It reflects the graph across the x-axis.
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Q. What is the effect of parathyroid hormone (PTH)? (2019)
A.
Increase calcium levels in blood
B.
Decrease calcium levels in blood
C.
Increase phosphate levels
D.
Decrease phosphate levels
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Solution
Parathyroid hormone (PTH) increases calcium levels in the blood by stimulating the release of calcium from bones and increasing calcium absorption in the intestines.
Correct Answer:
A
— Increase calcium levels in blood
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Q. What is the effect of photoperiod on flowering in plants? (2020)
A.
It has no effect
B.
It determines the timing of flowering
C.
It inhibits flowering
D.
It promotes vegetative growth
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Solution
Photoperiod is crucial in determining the timing of flowering in many plants, influencing their reproductive cycle.
Correct Answer:
B
— It determines the timing of flowering
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