Undergraduate MCQ & Objective Questions
The undergraduate level is a crucial phase in a student's academic journey, especially for those preparing for school and competitive exams. Mastering this stage can significantly enhance your understanding and retention of key concepts. Practicing MCQs and objective questions is essential, as it not only helps in reinforcing knowledge but also boosts your confidence in tackling important questions during exams.
What You Will Practise Here
Fundamental concepts in Mathematics and Science
Key definitions and theories across various subjects
Important formulas and their applications
Diagrams and graphical representations
Critical thinking and problem-solving techniques
Subject-specific MCQs designed for competitive exams
Revision of essential topics for better retention
Exam Relevance
Undergraduate topics are integral to various examinations such as CBSE, State Boards, NEET, and JEE. These subjects often feature a mix of conceptual and application-based questions. Common patterns include multiple-choice questions that assess both theoretical knowledge and practical application, making it vital for students to be well-versed in undergraduate concepts.
Common Mistakes Students Make
Overlooking the importance of understanding concepts rather than rote memorization
Misinterpreting questions due to lack of careful reading
Neglecting to practice numerical problems that require application of formulas
Failing to review mistakes made in previous practice tests
FAQs
Question: What are some effective strategies for solving undergraduate MCQ questions?Answer: Focus on understanding the concepts, practice regularly, and review your answers to learn from mistakes.
Question: How can I improve my speed in answering objective questions?Answer: Time yourself while practicing and gradually increase the number of questions you attempt in a set time.
Start your journey towards mastering undergraduate subjects today! Solve practice MCQs and test your understanding to ensure you are well-prepared for your exams. Your success is just a question away!
Q. What is the term used for the scientific study of living organisms? (2020)
A.
Biology
B.
Zoology
C.
Botany
D.
Ecology
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Solution
Biology is the scientific study of living organisms.
Correct Answer:
A
— Biology
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Q. What is the term used for the study of living organisms? (2021)
A.
Biology
B.
Zoology
C.
Botany
D.
Ecology
Show solution
Solution
Biology is the term used for the study of living organisms.
Correct Answer:
A
— Biology
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Q. What is the thermal conductivity of a material if a 1 m² area of it conducts 100 J of heat in 10 seconds with a temperature difference of 20°C?
A.
2 W/m°C
B.
5 W/m°C
C.
10 W/m°C
D.
20 W/m°C
Show solution
Solution
Using the formula Q = kA(T1-T2)t, we find k = Q / (A(T1-T2)t) = 100 J / (1 m² * 20°C * 10 s) = 0.5 W/m°C.
Correct Answer:
B
— 5 W/m°C
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Q. What is the time period of a wave with a frequency of 20 Hz? (2022)
A.
0.05 s
B.
0.1 s
C.
0.2 s
D.
0.5 s
Show solution
Solution
The time period T is the reciprocal of frequency, T = 1/f. Thus, T = 1/20 Hz = 0.05 s.
Correct Answer:
B
— 0.1 s
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Q. What is the total current flowing in a circuit with a 9V battery and a total resistance of 3 ohms? (2020)
A.
1 A
B.
2 A
C.
3 A
D.
4 A
Show solution
Solution
Using Ohm's law, I = V/R = 9V / 3Ω = 3 A.
Correct Answer:
B
— 2 A
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Q. What is the total current flowing in a circuit with three resistors in parallel, each carrying 2 A? (2021)
A.
2 A
B.
4 A
C.
6 A
D.
8 A
Show solution
Solution
In parallel, the total current is the sum of the currents: 2 A + 2 A + 2 A = 6 A.
Correct Answer:
C
— 6 A
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Q. What is the total current flowing 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
Show solution
Solution
In a parallel circuit, the total current is the sum of the currents in each branch: 2 A + 3 A = 5 A.
Correct Answer:
A
— 5 A
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Q. What is the total current flowing through a circuit with a 9V battery and a total resistance of 3Ω? (2022)
Show solution
Solution
Using Ohm's law, I = V/R = 9V / 3Ω = 3A.
Correct Answer:
B
— 2A
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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)
Show solution
Solution
Total resistance R = 10Ω + 5Ω = 15Ω. Current I = V/R = 30V/15Ω = 2A.
Correct Answer:
B
— 3A
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Q. What is the total current in a circuit with a 12V battery and two 6Ω resistors in series? (2021)
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Solution
Total resistance R = 6 + 6 = 12Ω. Current I = V/R = 12V/12Ω = 1A.
Correct Answer:
B
— 2A
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Q. What is the total current in a circuit with a 15V battery and two 5Ω resistors in series? (2023)
Show solution
Solution
Total resistance R = 5Ω + 5Ω = 10Ω; I = V/R = 15V / 10Ω = 1.5A.
Correct Answer:
B
— 2A
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Q. What is the total current in a circuit with a 9V battery and two 3Ω resistors in series? (2021)
Show solution
Solution
Total resistance R = 3Ω + 3Ω = 6Ω. Current I = V/R = 9V/6Ω = 1.5A.
Correct Answer:
A
— 1A
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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
Show solution
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
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Q. What is the total current in a circuit with two branches, one carrying 2A and the other 3A? (2021)
Show solution
Solution
In parallel circuits, the total current is the sum of the currents in each branch: 2A + 3A = 5A.
Correct Answer:
A
— 5A
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Q. What is the total current in a circuit with two branches, one carrying 3A and the other 5A? (2021)
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Solution
In parallel circuits, the total current is the sum of the currents in each branch: 3A + 5A = 8A.
Correct Answer:
D
— 8A
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Q. What is the total current in a circuit with two branches, one with 3A and the other with 2A? (2022)
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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
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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
Show solution
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
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Q. What is the total current in a parallel circuit with two branches carrying 3A and 5A? (2020)
Show solution
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
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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
Show solution
Solution
Total current in parallel = I1 + I2 = 5A + 3A = 8A.
Correct Answer:
A
— 8A
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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)
Show solution
Solution
Total impedance Z = √(R² + (ωL)²) = √(10² + (2π(50)(20))²). Calculate to find current.
Correct Answer:
B
— 4A
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Q. What is the total mechanical energy of a pendulum at its highest point? (2022)
A.
Maximum potential energy
B.
Maximum kinetic energy
C.
Zero
D.
Constant
Show solution
Solution
At the highest point of a pendulum's swing, all the mechanical energy is potential energy, and kinetic energy is zero.
Correct Answer:
A
— Maximum potential energy
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Q. What is the total mechanical energy of a simple harmonic oscillator at maximum displacement? (2022)
A.
Zero
B.
Maximum
C.
Minimum
D.
Constant
Show solution
Solution
At maximum displacement, the total mechanical energy of a simple harmonic oscillator is at its maximum, as all energy is potential.
Correct Answer:
B
— Maximum
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Q. What is the total mechanical energy of a simple harmonic oscillator with a mass of 1 kg, amplitude of 0.1 m, and spring constant of 100 N/m? (2022)
A.
0.5 J
B.
1 J
C.
2 J
D.
4 J
Show solution
Solution
The total mechanical energy E is given by E = (1/2)kA². Therefore, E = (1/2)(100)(0.1)² = 0.5 J.
Correct Answer:
B
— 1 J
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Q. What is the total mechanical energy of a system at the highest point of a projectile's trajectory?
A.
Maximum potential energy
B.
Maximum kinetic energy
C.
Zero energy
D.
Constant energy
Show solution
Solution
At the highest point of a projectile's trajectory, the kinetic energy is minimum (zero at the peak) and potential energy is maximum, thus total mechanical energy is maximum potential energy.
Correct Answer:
A
— Maximum potential energy
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Q. What is the total mechanical energy of an object in free fall just before it hits the ground? (2022)
A.
Zero
B.
Potential energy only
C.
Kinetic energy only
D.
Total energy is conserved
Show solution
Solution
The total mechanical energy of an object in free fall is conserved, meaning it remains constant as potential energy converts to kinetic energy.
Correct Answer:
D
— Total energy is conserved
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Q. What is the total number of moles in 2 liters of a 3 M solution? (2022)
A.
3 moles
B.
6 moles
C.
1.5 moles
D.
4 moles
Show solution
Solution
Moles = Molarity * Volume = 3 mol/L * 2 L = 6 moles.
Correct Answer:
B
— 6 moles
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Q. What is the total power consumed in a circuit with a power factor of 0.6, if the apparent power is 100 VA? (2023)
A.
60 W
B.
100 W
C.
40 W
D.
80 W
Show solution
Solution
The real power (P) can be calculated using P = Power Factor × Apparent Power. Therefore, P = 0.6 × 100 VA = 60 W.
Correct Answer:
A
— 60 W
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Q. What is the total power consumed in a circuit with two 10Ω resistors in series connected to a 20V source? (2020)
A.
20W
B.
40W
C.
10W
D.
30W
Show solution
Solution
Total resistance R = 10Ω + 10Ω = 20Ω. Power P = V²/R = 20² / 20 = 20W.
Correct Answer:
B
— 40W
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Q. What is the total power consumed in a circuit with two 5Ω resistors in series connected to a 30V battery? (2023)
A.
90W
B.
60W
C.
30W
D.
45W
Show solution
Solution
Total resistance R = 5Ω + 5Ω = 10Ω; Power P = V²/R = 30²/10 = 90W.
Correct Answer:
B
— 60W
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Q. What is the total resistance in a circuit with a 10Ω resistor and a 20Ω resistor in series? (2022)
A.
30Ω
B.
20Ω
C.
10Ω
D.
15Ω
Show solution
Solution
In series, R_eq = R1 + R2 = 10Ω + 20Ω = 30Ω.
Correct Answer:
A
— 30Ω
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