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. What is the total current flowing through a circuit if the total voltage is 24V and the total resistance is 6Ω?

A. 2A
B. 4A
C. 6A
D. 8A

Solution

Using Ohm's Law, I = V/R = 24V / 6Ω = 4A.

Correct Answer: B — 4A

Q. What is the total current flowing through a circuit with a 10V battery and two 5Ω resistors in parallel?

A. 1A
B. 2A
C. 5A
D. 10A

Solution

Equivalent resistance R_eq = 1/(1/5 + 1/5) = 2.5Ω. Total current I = V/R_eq = 10V/2.5Ω = 4A.

Correct Answer: B — 2A

Q. What is the total current flowing through a circuit with a 10V battery and two 5Ω resistors in series?

A. 0.5A
B. 1A
C. 2A
D. 5A

Solution

Total resistance R = R1 + R2 = 5Ω + 5Ω = 10Ω. Using Ohm's law, I = V/R = 10V/10Ω = 1A.

Correct Answer: B — 1A

Q. What is the total current flowing through a circuit with a 9V battery and a total resistance of 3Ω? (2022)

A. 1A
B. 2A
C. 3A
D. 4A

Solution

Using Ohm's law, I = V/R = 9V / 3Ω = 3A.

Correct Answer: B — 2A

Q. What is the total current flowing through a junction where 5A enters and 3A and 2A leave?

A. 0A
B. 2A
C. 3A
D. 5A

Solution

According to Kirchhoff's Current Law, the total current entering a junction equals the total current leaving. Here, 5A = 3A + 2A.

Correct Answer: A — 0A

Q. What is the total current in a circuit with a 10V battery and two 5 ohm resistors in parallel?

A. 1 A
B. 2 A
C. 3 A
D. 4 A

Solution

Equivalent resistance R_eq = 1/(1/5 + 1/5) = 2.5 ohms. Total current I = V/R_eq = 10V / 2.5Ω = 4 A.

Correct Answer: B — 2 A

Q. What is the total current in a circuit with a 10Ω resistor and a 5Ω resistor in series connected to a 30V battery? (2021)

A. 2A
B. 3A
C. 4A
D. 5A

Solution

Total resistance R = 10Ω + 5Ω = 15Ω. Current I = V/R = 30V/15Ω = 2A.

Correct Answer: B — 3A

Q. What is the total current in a circuit with a 12V battery and a total resistance of 3 ohms?

A. 4 A
B. 2 A
C. 3 A
D. 1 A

Solution

Using Ohm's law, I = V/R, we have I = 12V / 3 ohms = 4 A.

Correct Answer: A — 4 A

Q. What is the total current in a circuit with a 12V battery and three 4 ohm resistors connected in series?

A. 1A
B. 2A
C. 3A
D. 4A

Solution

Total resistance R_total = 4 + 4 + 4 = 12 ohms. Current I = V/R_total = 12V / 12 ohms = 1A.

Correct Answer: B — 2A

Q. What is the total current in a circuit with a 12V battery and three resistors (R1 = 4Ω, R2 = 4Ω, R3 = 4Ω) connected in parallel?

A. 3A
B. 4A
C. 2A
D. 1A

Solution

Total resistance R_eq = 1 / (1/R1 + 1/R2 + 1/R3) = 1 / (1/4 + 1/4 + 1/4) = 1.33Ω. Current I = V / R_eq = 12V / 1.33Ω ≈ 9A.

Correct Answer: B — 4A

Q. What is the total current in a circuit with a 12V battery and two 4 ohm resistors in series?

A. 1 A
B. 2 A
C. 3 A
D. 4 A

Solution

Total resistance R = R1 + R2 = 4 + 4 = 8 ohms. Current I = V/R = 12V / 8 ohms = 1.5 A.

Correct Answer: B — 2 A

Q. What is the total current in a circuit with a 12V battery and two 6Ω resistors in series? (2021)

A. 1A
B. 2A
C. 3A
D. 4A

Solution

Total resistance R = 6 + 6 = 12Ω. Current I = V/R = 12V/12Ω = 1A.

Correct Answer: B — 2A

Q. What is the total current in a circuit with a 15V battery and two 5Ω resistors in series? (2023)

A. 1A
B. 2A
C. 3A
D. 4A

Solution

Total resistance R = 5Ω + 5Ω = 10Ω; I = V/R = 15V / 10Ω = 1.5A.

Correct Answer: B — 2A

Q. What is the total current in a circuit with a 24V battery and three resistors (2Ω, 4Ω, and 6Ω) connected in series?

A. 2A
B. 3A
C. 4A
D. 6A

Solution

Total resistance R = R1 + R2 + R3 = 2Ω + 4Ω + 6Ω = 12Ω. Using Ohm's law, I = V/R = 24V / 12Ω = 2A.

Correct Answer: B — 3A

Q. What is the total current in a circuit with a 9V battery and a 3Ω resistor?

A. 1A
B. 2A
C. 3A
D. 4A

Solution

Using Ohm's law, I = V/R = 9V/3Ω = 3A.

Correct Answer: B — 2A

Q. What is the total current in a circuit with a 9V battery and two 3Ω resistors in parallel?

A. 1A
B. 2A
C. 3A
D. 4A

Solution

Total resistance R = 1/(1/3 + 1/3) = 1.5Ω; I = V/R = 9V/1.5Ω = 6A.

Correct Answer: B — 2A

Q. What is the total current in a circuit with a 9V battery and two 3Ω resistors in series? (2021)

A. 1A
B. 2A
C. 3A
D. 4A

Solution

Total resistance R = 3Ω + 3Ω = 6Ω. Current I = V/R = 9V/6Ω = 1.5A.

Correct Answer: A — 1A

Q. What is the total current in a circuit with a voltage of 240V, resistance of 20 ohms, and inductive reactance of 30 ohms? (2022)

A. 8 A
B. 6 A
C. 4 A
D. 10 A

Solution

Z = √(R² + Xl²) = √(20² + 30²) = √(400 + 900) = √1300 = 36.06 ohms. I = V/Z = 240/36.06 = 6.66 A.

Correct Answer: B — 6 A

Q. What is the total current in a circuit with two branches, one carrying 2 A and the other 3 A?

A. 5 A
B. 6 A
C. 1 A
D. 0 A

Solution

In a parallel circuit, the total current is the sum of the currents in each branch: I_total = I1 + I2 = 2 A + 3 A = 5 A.

Correct Answer: A — 5 A

Q. What is the total current in a circuit with two branches, one carrying 2A and the other 3A? (2021)

A. 5A
B. 6A
C. 3A
D. 2A

Solution

In parallel circuits, the total current is the sum of the currents in each branch: 2A + 3A = 5A.

Correct Answer: A — 5A

Q. What is the total current in a circuit with two branches, one carrying 3A and the other 5A? (2021)

A. 2A
B. 3A
C. 5A
D. 8A

Solution

In parallel circuits, the total current is the sum of the currents in each branch: 3A + 5A = 8A.

Correct Answer: D — 8A

Q. What is the total current in a circuit with two branches, one with 3A and the other with 2A? (2022)

A. 5A
B. 6A
C. 3A
D. 2A

Solution

In parallel circuits, the total current is the sum of the currents in each branch: I_total = 3A + 2A = 5A.

Correct Answer: A — 5A

Q. What is the total current in a parallel circuit with three branches carrying 2 A, 3 A, and 5 A respectively?

A. 10 A
B. 5 A
C. 3 A
D. 2 A

Solution

In a parallel circuit, the total current is the sum of the currents in each branch: I_total = 2 A + 3 A + 5 A = 10 A.

Correct Answer: A — 10 A

Q. What is the total current in a parallel circuit with two branches carrying 2 A and 3 A respectively? (2023)

A. 5 A
B. 6 A
C. 1 A
D. 2.5 A

Solution

In a parallel circuit, the total current is the sum of the currents in the branches: 2 A + 3 A = 5 A.

Correct Answer: A — 5 A

Q. What is the total current in a parallel circuit with two branches carrying 3 A and 5 A?

A. 8 A
B. 15 A
C. 5 A
D. 3 A

Solution

In a parallel circuit, the total current is the sum of the currents in each branch: I_total = I1 + I2 = 3 A + 5 A = 8 A.

Correct Answer: A — 8 A

Q. What is the total current in a parallel circuit with two branches carrying 3A and 5A? (2020)

A. 8A
B. 15A
C. 5A
D. 3A

Solution

In a parallel circuit, the total current (I_total) is the sum of the currents in each branch: I_total = 3A + 5A = 8A.

Correct Answer: A — 8A

Q. What is the total current in a parallel circuit with two branches, one with 5A and the other with 3A? (2022)

A. 8A
B. 15A
C. 2.5A
D. 5A

Solution

Total current in parallel = I1 + I2 = 5A + 3A = 8A.

Correct Answer: A — 8A

Q. What is the total current in a series circuit with a 10Ω resistor and a 20Ω inductor connected to a 100V AC source at 50Hz? (2023)

A. 2A
B. 4A
C. 5A
D. 10A

Solution

Total impedance Z = √(R² + (ωL)²) = √(10² + (2π(50)(20))²). Calculate to find current.

Correct Answer: B — 4A

Q. What is the total electric flux through a closed surface surrounding a charge of -3Q?

A. -3Q/ε₀
B. 3Q/ε₀
C. 0
D. -Q/ε₀

Solution

The total electric flux through a closed surface is given by Φ = Q_enc/ε₀, where Q_enc is the enclosed charge.

Correct Answer: A — -3Q/ε₀

Q. What is the total energy stored in a capacitor of capacitance 20 microfarads charged to 10 volts?

A. 1 joule
B. 0.1 joule
C. 0.01 joule
D. 0.5 joule

Solution

Energy (E) stored in a capacitor is given by E = 0.5 * C * V^2. Thus, E = 0.5 * 20 x 10^-6 F * (10 V)^2 = 0.1 joules.

Correct Answer: B — 0.1 joule

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