Q. A concave mirror has a focal length of 20 cm. What is the distance of the object from the mirror if the image formed is at a distance of 30 cm from the mirror? (2021)
A.
10 cm
B.
15 cm
C.
25 cm
D.
30 cm
Solution
Using the mirror formula: 1/f = 1/v + 1/u, where f = -20 cm (concave mirror), v = -30 cm (image distance), we find u = 25 cm.
Q. A country aims to reduce its carbon emissions by 20% over 5 years. If the current emissions are 1,000 tons, what will be the target emissions after 5 years?
Q. A country plans to increase its national park area by 15% each year. If the current area is 200 square kilometers, what will be the area after 1 year? (2023)
A.
230
B.
240
C.
250
D.
260
Solution
Area after 1 year = 200 * 1.15 = 230 square kilometers.
Q. A country plans to reduce its carbon emissions by 10% each year. If the current emissions are 500 tons, what will be the emissions after 1 year? (2022)
A.
450 tons
B.
400 tons
C.
500 tons
D.
550 tons
Solution
Emissions after 1 year = 500 - (10% of 500) = 500 - 50 = 450 tons.
Q. A country signed a treaty that will reduce its carbon emissions by 30%. If its current emissions are 2 million tons, what will be the new emissions after the reduction?
A.
1.4 million tons
B.
1.5 million tons
C.
1.6 million tons
D.
1.7 million tons
Solution
New emissions = Current emissions - (30% of Current emissions) = 2 million tons - (0.3 * 2 million tons) = 1.4 million tons.
Q. A diet consists of 60% carbohydrates, 25% proteins, and 15% fats. If the total caloric intake is 2000 calories, how many calories come from fats? (2020)
A.
300
B.
400
C.
500
D.
600
Solution
Calories from fats = 15% of 2000 = 0.15 * 2000 = 300 calories.
Q. A farmer has a rectangular field of dimensions 50 m by 30 m. If he wants to irrigate it with water from a river, how much water is needed to cover the field to a depth of 0.1 m? (2023)
A.
150 m³
B.
300 m³
C.
500 m³
D.
100 m³
Solution
Volume of water needed = Area × Depth = (50 m × 30 m) × 0.1 m = 150 m³.
General Knowledge (NDA) is a crucial component of various competitive exams, including the NDA entrance test. Mastering this subject not only enhances your awareness of current affairs but also significantly boosts your exam scores. Practicing MCQs and objective questions helps you identify important topics and improves your ability to tackle exam questions effectively. By engaging with practice questions, you can solidify your understanding and prepare thoroughly for your upcoming exams.
What You Will Practise Here
Current Affairs: National and International Events
History: Key Dates and Important Figures
Geography: Physical and Political Maps
Indian Polity: Constitution and Governance
Economics: Basic Concepts and Terminology
Science: Fundamental Principles and Discoveries
General Awareness: Sports, Awards, and Recognitions
Exam Relevance
General Knowledge is a significant section in various exams such as CBSE, State Boards, NEET, and JEE. In these assessments, you can expect questions that test your understanding of historical events, geographical facts, and current affairs. Common question patterns include multiple-choice questions that require you to select the correct answer from a set of options, making it essential to be well-prepared with important General Knowledge (NDA) questions for exams.
Common Mistakes Students Make
Overlooking current affairs, assuming they are less important.
Confusing similar historical events or dates.
Neglecting to revise basic geographical concepts.
Misunderstanding key terms in Indian polity and governance.
Failing to connect economic principles with real-world scenarios.
FAQs
Question: What are the best ways to prepare for General Knowledge (NDA)? Answer: Regularly read newspapers, follow current affairs, and practice MCQs to enhance your knowledge.
Question: How can I improve my speed in answering General Knowledge questions? Answer: Time yourself while practicing and focus on understanding concepts rather than rote memorization.
Start your journey towards mastering General Knowledge (NDA) today! Solve practice MCQs and test your understanding to ensure you are well-prepared for your exams. Every question you tackle brings you one step closer to success!
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