Major Competitive Exams

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Major Competitive Exams

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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!

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Q. If a machine can produce 1000 items in 5 hours, how many items can it produce in 1 hour?

A. 150 items
B. 200 items
C. 250 items
D. 300 items

Solution

Items per hour = Total Items / Total Hours = 1000 items / 5 hours = 200 items.

Correct Answer: B — 200 items

Q. If a machine does 200 J of work in 10 seconds, what is its power? (2022)

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

Solution

Power (P) = Work / Time = 200 J / 10 s = 20 W

Correct Answer: A — 20 W

Q. If a machine does 200 J of work in 5 seconds, what is its power output?

A. 20 W
B. 40 W
C. 50 W
D. 60 W

Solution

Power = Work / Time = 200 J / 5 s = 40 W.

Correct Answer: B — 40 W

Q. If a machine does 200 J of work in 5 seconds, what is its power? (2022)

A. 40 W
B. 50 W
C. 20 W
D. 30 W

Solution

Power (P) = Work Done (W) / Time (t) = 200 J / 5 s = 40 W

Correct Answer: B — 50 W

Q. If a machine does 2000 J of work in 5 seconds, what is its power output?

A. 200 W
B. 400 W
C. 500 W
D. 600 W

Solution

Power = Work / Time = 2000 J / 5 s = 400 W.

Correct Answer: B — 400 W

Q. If a machine does 2000 J of work in 5 seconds, what is its power? (2022)

A. 400 W
B. 200 W
C. 100 W
D. 500 W

Solution

Power (P) = Work Done / Time = 2000 J / 5 s = 400 W

Correct Answer: A — 400 W

Q. If a machine does 3000 J of work in 10 seconds, what is its power output?

A. 300 W
B. 150 W
C. 600 W
D. 1000 W

Solution

Power (P) = Work (W) / Time (t) = 3000 J / 10 s = 300 W.

Correct Answer: A — 300 W

Q. If a machine does 500 J of work in 10 seconds, what is its power output?

A. 50 W
B. 100 W
C. 200 W
D. 500 W

Solution

Power is calculated using the formula P = W/t. Here, W = 500 J and t = 10 s. Thus, P = 500 J / 10 s = 50 W.

Correct Answer: B — 100 W

Q. If a machine does 500 J of work in 10 seconds, what is its power?

A. 50 W
B. 100 W
C. 200 W
D. 500 W

Solution

Power = Work / Time = 500 J / 10 s = 50 W.

Correct Answer: A — 50 W

Q. If a machine does 500 Joules of work in 10 seconds, what is its power output?

A. 50 Watts
B. 100 Watts
C. 200 Watts
D. 500 Watts

Solution

Power is calculated as work done divided by time taken. Here, Power = 500 J / 10 s = 50 W.

Correct Answer: B — 100 Watts

Q. If a machine has a power output of 200 W, how much work can it do in 5 seconds? (2000)

A. 500 J
B. 1000 J
C. 1500 J
D. 2000 J

Solution

Work done (W) = Power (P) × Time (t) = 200 W × 5 s = 1000 J.

Correct Answer: B — 1000 J

Q. If a machine has an efficiency of 80% and it consumes 1000 J of energy, what is the useful work output?

A. 800 J
B. 1000 J
C. 200 J
D. 600 J

Solution

Useful work output can be calculated using the formula: Useful Work = Efficiency * Input Energy. Here, Useful Work = 0.8 * 1000 J = 800 J.

Correct Answer: A — 800 J

Q. If a machine has an efficiency of 80% and it does 400 J of useful work, how much energy was supplied to the machine? (2023)

A. 500 J
B. 400 J
C. 320 J
D. 600 J

Solution

Efficiency = Useful Work / Total Energy Input. Total Energy Input = Useful Work / Efficiency = 400 J / 0.8 = 500 J.

Correct Answer: A — 500 J

Q. If a magnetic field is applied perpendicular to a loop of wire, what is the effect on the induced EMF?

A. It is maximum
B. It is minimum
C. It is zero
D. It fluctuates

Solution

When a magnetic field is applied perpendicular to a loop of wire, the magnetic flux through the loop is maximized, resulting in maximum induced EMF according to Faraday's law.

Correct Answer: A — It is maximum

Q. If a magnetic field is directed into the page and a positive charge moves to the right, what is the direction of the magnetic force acting on the charge?

A. Into the page
B. Out of the page
C. Upward
D. Downward

Solution

Using the right-hand rule, point your thumb in the direction of the velocity (to the right) and your fingers in the direction of the magnetic field (into the page). Your palm will face out of the page, indicating the direction of the force.

Correct Answer: B — Out of the page

Q. If a magnetic field is increasing at a rate of 0.1 T/s, what is the induced EMF in a coil of 50 turns and area 0.2 m²? (2021)

A. 1 V
B. 0.5 V
C. 0.2 V
D. 0.1 V

Solution

Induced EMF (ε) = -N * (dB/dt) * A = -50 * 0.1 T/s * 0.2 m² = -1 V.

Correct Answer: A — 1 V

Q. If a magnetic field of 0.1 T is perpendicular to a circular loop of radius 0.1 m, what is the magnetic flux through the loop?

A. 0.01 Wb
B. 0.03 Wb
C. 0.1 Wb
D. 0.05 Wb

Solution

Magnetic flux (Φ) = B * A = B * πr². Here, A = π(0.1)² = 0.01π m². Thus, Φ = 0.1 * 0.01π = 0.01π Wb ≈ 0.0314 Wb.

Correct Answer: A — 0.01 Wb

Q. If a man sells an article for $150 at a profit of 20%, what was the cost price?

A. $125
B. $130
C. $140
D. $120

Solution

Let the cost price be x. Selling Price = Cost Price + Profit = x + 0.2x = 1.2x. 1.2x = 150, x = 150/1.2 = 125.

Correct Answer: A — $125

Q. If a marine ecosystem has 500 fish and 30% of them are herbivores, how many herbivorous fish are there?

A. 150
B. 200
C. 100
D. 250

Solution

30% of 500 is 150, so there are 150 herbivorous fish.

Correct Answer: A — 150

Q. If a marine ecosystem has a fish population of 5000 and 20% of them are predators, how many predator fish are there?

A. 800
B. 900
C. 1000
D. 1100

Solution

5000 * 0.20 = 1000 predator fish.

Correct Answer: C — 1000

Q. If a marine reserve has 250 species of fish and 40% are coral reef species, how many coral reef species are there?

A. 80
B. 90
C. 100
D. 110

Solution

40% of 250 is 0.40 * 250 = 100.

Correct Answer: C — 100

Q. If a mass is measured as 75 kg with an error of 0.5 kg, what is the minimum possible mass?

A. 74.5 kg
B. 75 kg
C. 75.5 kg
D. 76 kg

Solution

Minimum possible mass = Measured value - Error = 75 - 0.5 = 74.5 kg

Correct Answer: A — 74.5 kg

Q. If a material exhibits a linear stress-strain relationship, what type of material is it likely to be?

A. Brittle material
B. Ductile material
C. Elastic material
D. Plastic material

Solution

A linear stress-strain relationship indicates that the material behaves elastically within the limit of proportionality.

Correct Answer: C — Elastic material

Q. If a material exhibits plastic deformation, which of the following is true?

A. It returns to its original shape after the load is removed
B. It does not return to its original shape after the load is removed
C. It behaves like a perfect elastic material
D. It has a very high Young's modulus

Solution

Plastic deformation means that the material does not return to its original shape after the load is removed.

Correct Answer: B — It does not return to its original shape after the load is removed

Q. If a material has a high shear modulus, what does it imply about the material?

A. It is very flexible
B. It is very stiff against shear forces
C. It is very brittle
D. It is very ductile

Solution

A high shear modulus indicates that the material is very stiff and resists shear deformation.

Correct Answer: B — It is very stiff against shear forces

Q. If a material has a high shear modulus, what does it indicate about the material? (2023)

A. It is very elastic
B. It is very ductile
C. It resists shear deformation
D. It is very brittle

Solution

A high shear modulus indicates that the material resists shear deformation.

Correct Answer: C — It resists shear deformation

Q. If a material has a Poisson's ratio of 0.3, what does this imply about its behavior under stress?

A. It expands laterally
B. It contracts laterally
C. It does not change shape
D. It becomes brittle

Solution

A Poisson's ratio of 0.3 indicates that the material will contract laterally when stretched.

Correct Answer: B — It contracts laterally

Q. If a material has a Poisson's ratio of 0.3, what does this imply about its lateral strain when subjected to axial strain?

A. Lateral strain is equal to axial strain
B. Lateral strain is 0.3 times the axial strain
C. Lateral strain is 3 times the axial strain
D. Lateral strain is independent of axial strain

Solution

A Poisson's ratio of 0.3 means that the lateral strain is 0.3 times the axial strain.

Correct Answer: B — Lateral strain is 0.3 times the axial strain

Q. If a material has a Poisson's ratio of 0.3, what does this imply?

A. It expands laterally when stretched
B. It contracts laterally when stretched
C. It has no lateral strain
D. It is incompressible

Solution

A Poisson's ratio of 0.3 implies that the material contracts laterally when stretched.

Correct Answer: B — It contracts laterally when stretched

Q. If a material has a shear modulus of 80 GPa and a shear stress of 40 MPa is applied, what is the shear strain? (2023)

A. 0.0005
B. 0.005
C. 0.5
D. 0.05

Solution

Shear strain (γ) = Shear stress (τ) / Shear modulus (G) = 40 MPa / 80 GPa = 0.0005.

Correct Answer: A — 0.0005

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