Q. What happens to the light ray when it hits the boundary at an angle greater than the critical angle?
A.
It is refracted
B.
It is absorbed
C.
It is reflected back into the denser medium
D.
It passes into the rarer medium
Solution
When the angle of incidence exceeds the critical angle, the light ray undergoes total internal reflection and is reflected back into the denser medium.
Correct Answer:
C
— It is reflected back into the denser medium
Q. What happens to the magnetic field inside a long solenoid when the current through it is increased?
A.
Magnetic field decreases
B.
Magnetic field remains constant
C.
Magnetic field increases
D.
Magnetic field becomes zero
Solution
The magnetic field inside a long solenoid is directly proportional to the current flowing through it. Increasing the current increases the magnetic field strength.
Q. What happens to the magnetic field inside a solenoid when the current is increased? (2020)
A.
It decreases
B.
It remains constant
C.
It increases
D.
It becomes zero
Solution
The magnetic field inside a solenoid is directly proportional to the current. Therefore, if the current is increased, the magnetic field also increases.
Q. What happens to the magnetic field inside a solenoid when the current through it is increased?
A.
It decreases
B.
It remains constant
C.
It increases
D.
It becomes zero
Solution
The magnetic field inside a solenoid is directly proportional to the current flowing through it, so increasing the current increases the magnetic field.
Q. What happens to the magnetic field strength if the distance from a long straight conductor is doubled?
A.
It doubles
B.
It halves
C.
It quadruples
D.
It becomes zero
Solution
The magnetic field strength around a long straight conductor is inversely proportional to the distance from the conductor. Therefore, if the distance is doubled, the magnetic field strength halves.
Q. What happens to the magnetic field strength inside a long solenoid if the current is doubled? (2021)
A.
It remains the same
B.
It doubles
C.
It quadruples
D.
It halves
Solution
The magnetic field strength inside a solenoid is directly proportional to the current flowing through it. Therefore, doubling the current will double the magnetic field strength.
Q. What happens to the magnetic field strength inside a long solenoid when the current through it is increased?
A.
It decreases
B.
It remains constant
C.
It increases
D.
It becomes zero
Solution
The magnetic field strength inside a long solenoid is directly proportional to the current flowing through it; thus, it increases with an increase in current.
Q. What happens to the magnetic field strength inside a solenoid if the current through it is doubled? (2021)
A.
It remains the same
B.
It doubles
C.
It quadruples
D.
It halves
Solution
The magnetic field strength inside a solenoid is directly proportional to the current flowing through it. Therefore, if the current is doubled, the magnetic field strength also doubles.
Q. What happens to the magnetic field strength inside a solenoid if the number of turns is increased? (2023)
A.
It decreases
B.
It remains the same
C.
It increases
D.
It becomes zero
Solution
The magnetic field strength inside a solenoid increases with the number of turns, as it is directly proportional to the number of turns per unit length.
Q. What happens to the magnetic field strength inside a solenoid if the number of turns per unit length is increased? (2023)
A.
It decreases
B.
It increases
C.
It remains the same
D.
It becomes zero
Solution
The magnetic field strength inside a solenoid is directly proportional to the number of turns per unit length. Therefore, if the number of turns per unit length is increased, the magnetic field strength also increases.
Q. What happens to the magnetic field when the distance from a long straight conductor is doubled? (2023)
A.
It doubles
B.
It halves
C.
It remains the same
D.
It quadruples
Solution
The magnetic field around a long straight conductor decreases with distance. Specifically, it is inversely proportional to the distance from the conductor.
Q. What happens to the number of emitted electrons if the intensity of light is increased while keeping the frequency above the threshold?
A.
The number of emitted electrons decreases
B.
The number of emitted electrons increases
C.
The energy of each emitted electron increases
D.
No electrons are emitted
Solution
Increasing the intensity of light increases the number of photons incident on the surface, leading to more emitted electrons, provided the frequency is above the threshold.
Correct Answer:
B
— The number of emitted electrons increases
Q. What happens to the number of emitted electrons if the intensity of the light is increased while keeping the frequency above the threshold?
A.
The number of emitted electrons decreases
B.
The number of emitted electrons increases
C.
The energy of each emitted electron increases
D.
No effect on the number of emitted electrons
Solution
Increasing the intensity of light increases the number of photons, which in turn increases the number of emitted electrons, provided the frequency is above the threshold.
Correct Answer:
B
— The number of emitted electrons increases
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!
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