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. If a volume is measured as 200 L with an error of 5 L, what is the range of possible volumes?
A.
195 L to 205 L
B.
200 L to 205 L
C.
195 L to 210 L
D.
200 L to 210 L
Show solution
Solution
Range of possible volumes = 200 - 5 to 200 + 5 = 195 L to 205 L.
Correct Answer:
A
— 195 L to 205 L
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Q. If a VPN encrypts data at a rate of 100 Mbps, how much data can it encrypt in 10 minutes?
A.
600 MB
B.
1200 MB
C.
1800 MB
D.
2400 MB
Show solution
Solution
100 Mbps * 600 seconds = 60000 MB = 1200 MB.
Correct Answer:
B
— 1200 MB
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Q. If a wall is to be painted and it measures 4 meters in height and 6 meters in width, how many square meters will be painted?
A.
20 sq meters
B.
24 sq meters
C.
30 sq meters
D.
36 sq meters
Show solution
Solution
Area = height * width = 4 * 6 = 24 sq meters.
Correct Answer:
B
— 24 sq meters
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Q. If a waste recycling program recycles 60% of the waste produced in a town of 500 tons per day, how much waste is recycled daily?
A.
300 tons
B.
250 tons
C.
200 tons
D.
350 tons
Show solution
Solution
Recycled waste = Total waste * Recycling rate = 500 * 0.60 = 300 tons.
Correct Answer:
A
— 300 tons
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Q. If a water reservoir loses 15% of its water due to evaporation each month, how much water remains after 3 months if it initially holds 1000 liters?
A.
610 liters
B.
685 liters
C.
850 liters
D.
750 liters
Show solution
Solution
After 1 month: 1000 - (0.15 * 1000) = 850 liters. After 2 months: 850 - (0.15 * 850) = 722.5 liters. After 3 months: 722.5 - (0.15 * 722.5) = 613.125 liters, rounded to 610 liters.
Correct Answer:
B
— 685 liters
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Q. If a wave has a frequency of 50 Hz and a wavelength of 2 m, what is its speed? (2018)
A.
100 m/s
B.
50 m/s
C.
25 m/s
D.
200 m/s
Show solution
Solution
Wave speed = frequency × wavelength = 50 Hz × 2 m = 100 m/s.
Correct Answer:
A
— 100 m/s
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Q. If a wave has a frequency of 50 Hz and a wavelength of 3 m, what is its speed? (2019)
A.
150 m/s
B.
100 m/s
C.
50 m/s
D.
200 m/s
Show solution
Solution
Wave speed (v) can be calculated using the formula v = fλ. Here, v = 50 Hz * 3 m = 150 m/s.
Correct Answer:
B
— 100 m/s
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Q. If a wave has a frequency of 50 Hz and a wavelength of 4 m, what is its speed? (2019)
A.
100 m/s
B.
200 m/s
C.
50 m/s
D.
25 m/s
Show solution
Solution
The speed of a wave can be calculated using the formula v = f × λ. Here, v = 50 Hz × 4 m = 200 m/s.
Correct Answer:
A
— 100 m/s
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Q. If a wave has a frequency of 50 Hz, what is its period? (2022)
A.
0.02 s
B.
0.5 s
C.
2 s
D.
20 s
Show solution
Solution
Period (T) = 1/Frequency = 1/50 Hz = 0.02 s.
Correct Answer:
A
— 0.02 s
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Q. If a wave has a speed of 300 m/s and a frequency of 150 Hz, what is its wavelength? (2023)
A.
1 m
B.
2 m
C.
3 m
D.
4 m
Show solution
Solution
Using the wave equation v = fλ, we can rearrange it to find λ = v/f. Thus, λ = 300 m/s / 150 Hz = 2 m.
Correct Answer:
B
— 2 m
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Q. If a website has a loading time of 3 seconds, how many seconds will it take to load 5 pages?
A.
10 seconds
B.
12 seconds
C.
15 seconds
D.
18 seconds
Show solution
Solution
Total loading time = 5 pages * 3 seconds/page = 15 seconds.
Correct Answer:
B
— 12 seconds
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Q. If a weight is measured as 10 kg with a 0.2 kg error, what is the maximum possible true weight?
A.
10.2 kg
B.
9.8 kg
C.
10 kg
D.
10.4 kg
Show solution
Solution
Maximum true weight = Measured weight + Error = 10 kg + 0.2 kg = 10.2 kg.
Correct Answer:
A
— 10.2 kg
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Q. If a weight is recorded as 0.050 kg, how many significant figures does this weight have?
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Solution
The leading zeros are not significant. Therefore, 0.050 kg has 2 significant figures.
Correct Answer:
B
— 2
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Q. If a wetland ecosystem can filter 200 liters of water per hour, how many liters can it filter in a day?
A.
2400 liters
B.
4800 liters
C.
5000 liters
D.
6000 liters
Show solution
Solution
200 liters/hour * 24 hours = 4800 liters in a day.
Correct Answer:
B
— 4800 liters
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Q. If a wheel of radius R rolls without slipping, what is the distance traveled by the center of mass after one complete rotation?
A.
2πR
B.
πR
C.
4R
D.
R/2
Show solution
Solution
The distance traveled by the center of mass after one complete rotation is equal to the circumference of the wheel, which is 2πR.
Correct Answer:
A
— 2πR
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Q. If a whistleblower receives a reward of 15% of the total amount recovered from corrupt officials, and the total recovery is $200,000, what is the reward amount?
A.
$15,000
B.
$20,000
C.
$25,000
D.
$30,000
Show solution
Solution
15% of $200,000 is $30,000.
Correct Answer:
B
— $20,000
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Q. If a wildlife reserve has 250 animals and the population increases by 10% each year, how many animals will there be after 2 years?
A.
275
B.
300
C.
305
D.
315
Show solution
Solution
250 * (1 + 0.10)^2 = 250 * 1.21 = 302.5, rounded to 305.
Correct Answer:
C
— 305
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Q. If a wind turbine generates 1.5 MW of power, how much power will it generate in 24 hours?
A.
36 MWh
B.
24 MWh
C.
48 MWh
D.
12 MWh
Show solution
Solution
Power generated = 1.5 MW * 24 hours = 36 MWh
Correct Answer:
A
— 36 MWh
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Q. If a wind turbine generates 2 MW of power and operates for 10 hours, how much energy does it produce?
A.
20 MWh
B.
15 MWh
C.
25 MWh
D.
30 MWh
Show solution
Solution
Energy produced = 2 MW * 10 hours = 20 MWh
Correct Answer:
A
— 20 MWh
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Q. If a winner receives a cash prize of $2500 and a runner-up receives $1500, what is the ratio of the winner's prize to the runner-up's prize?
A.
5:3
B.
3:5
C.
2:1
D.
1:2
Show solution
Solution
Ratio = 2500:1500 = 5:3.
Correct Answer:
A
— 5:3
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Q. If a wire carries a current of 3 A and has a resistance of 2 ohms, what is the power dissipated in the wire?
A.
6 W
B.
9 W
C.
12 W
D.
15 W
Show solution
Solution
Power is given by P = I^2 * R. Here, P = (3 A)^2 * 2 Ω = 9 * 2 = 18 W.
Correct Answer:
C
— 12 W
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Q. If a wire carries a current of 4 A and has a resistance of 2 ohms, what is the power dissipated in the wire?
A.
8 W
B.
16 W
C.
4 W
D.
2 W
Show solution
Solution
Power (P) is given by P = I^2 * R. Thus, P = (4 A)^2 * 2 Ω = 16 W.
Correct Answer:
B
— 16 W
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Q. If a wire carries a current of 5 A and is placed in a magnetic field of 0.1 T, what is the force per unit length on the wire?
A.
0.5 N/m
B.
1 N/m
C.
0.2 N/m
D.
0.1 N/m
Show solution
Solution
Using the formula F = BIL, where B is the magnetic field, I is the current, and L is the length of the wire (1 m), F = 0.1 T * 5 A * 1 m = 0.5 N.
Correct Answer:
B
— 1 N/m
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Q. If a wire carries a current of 5 A, what is the magnetic field at a distance of 0.1 m from the wire?
A.
0.1 T
B.
0.2 T
C.
0.5 T
D.
1.0 T
Show solution
Solution
Using Ampere's Law, B = μ₀I/2πr, where μ₀ = 4π × 10^-7 Tm/A, we find B = (4π × 10^-7)(5)/(2π(0.1)) = 0.1 T.
Correct Answer:
B
— 0.2 T
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Q. If a wire carrying current I is bent into a semicircular arc of radius R, what is the magnetic field at the center of the arc?
A.
μ₀I/(4R)
B.
μ₀I/(2R)
C.
μ₀I/(8R)
D.
μ₀I/(πR)
Show solution
Solution
The magnetic field at the center of a semicircular arc of radius R carrying current I is given by B = μ₀I/(4R).
Correct Answer:
A
— μ₀I/(4R)
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Q. If a wire is bent into a semicircular shape, what is the magnetic field at the center of the semicircle due to current I?
A.
μ₀I/(4R)
B.
μ₀I/(2R)
C.
μ₀I/(πR)
D.
μ₀I/(8R)
Show solution
Solution
The magnetic field at the center of a semicircular wire carrying current I is given by B = μ₀I/(4R) for the semicircle, which is half of the full circular loop.
Correct Answer:
C
— μ₀I/(πR)
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Q. If a wire is bent into a semicircular shape, what is the magnetic field at the center of the semicircle due to the current I?
A.
μ₀I/(4R)
B.
μ₀I/(2R)
C.
μ₀I/(8R)
D.
μ₀I/(6R)
Show solution
Solution
The magnetic field at the center of a semicircular wire carrying current I is given by B = μ₀I/(4R).
Correct Answer:
A
— μ₀I/(4R)
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Q. If a wire is stretched and its length increases by 2%, what is the strain?
A.
0.02
B.
0.2
C.
2
D.
200
Show solution
Solution
Strain is defined as the change in length divided by the original length, so 2% = 0.02.
Correct Answer:
A
— 0.02
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Q. If a wire of length L and cross-sectional area A is stretched by a force F, what is the expression for the elongation?
A.
F * L / (A * E)
B.
A * F / (L * E)
C.
E * F / (A * L)
D.
L * E / (A * F)
Show solution
Solution
The elongation (ΔL) can be expressed as ΔL = F * L / (A * E).
Correct Answer:
A
— F * L / (A * E)
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Q. If a wire's length is doubled while keeping its cross-sectional area constant, how does its resistance change?
A.
Remains the same
B.
Doubles
C.
Halves
D.
Quadruples
Show solution
Solution
Resistance is directly proportional to length; doubling the length doubles the resistance.
Correct Answer:
B
— Doubles
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