Science MCQs (Physics):
Physics MCQs – Set 16
🎓 Welcome to edusoars.blogspot.com!
Your trusted platform for mastering competitive exams.
We provide a comprehensive and ever-expanding library of Multiple Choice Questions (MCQs) designed not just for practice, but for true conceptual mastery.
What We Cover:
Our expert-curated MCQs span a wide array of high-demand subjects, including:
* Technology & Engineering: Computer Science, Engineering
* Core Academics: Mathematics, Science
* Testing Skills: Aptitude, Reasoning
* General Awareness: General Knowledge
Why Choose Edusoars?
We help you turn practice time into measurable progress:
* Conceptual Clarity: Every single MCQ is accompanied by a detailed, insightful explanation. This is crucial—you don't just learn what the answer is, you understand the concept behind the solution, allowing you to learn effectively from every mistake.
* Realistic Readiness: Test your knowledge with our variety of practice quizzes and simulated tests. They are designed to be as realistic as possible, helping you benchmark your performance and build exam-day confidence.
* Content That Grows: We are constantly adding new material across all subjects, ensuring you always have fresh, relevant content that reflects the latest exam patterns.
> Stop hoping you're prepared. Start knowing you are.
If you are serious about succeeding in your competitive exams, edusoars.blogspot.com is the strategic resource you need to reach your goals.
Science MCQs (Physics) – Set 16
Level: Ultra-Extreme + Numerical + Conceptual + Assertion–Reason
Best for SSC CGL, Railway JE, NDA, HP SET, State PCS
Physics MCQs – Set 16 (20 Questions with Explanation)
1. A body projected vertically upward returns to the point of projection. The ratio of time of ascent to time of descent is:
A. 1 : 2
B. 2 : 1
C. 1 : 1
D. 1 : 4
✅ Answer: C
📘 Explanation: Motion is symmetric under constant gravity (ignoring air resistance).
2. The dimensional formula of torque is:
A. [MLT⁻²]
B. [ML²T⁻²]
C. [ML²T⁻¹]
D. [M⁻¹L²T⁻²]
✅ Answer: B
📘 Explanation: Torque = Force × distance.
3. A wire of resistance R is stretched so that its length becomes three times. New resistance will be:
A. 3R
B. 6R
C. 9R
D. 27R
✅ Answer: D
📘 Explanation:
Volume constant ⇒ R ∝ L² ⇒ (3L)² = 9R ❌
Correct method:
R = ρL/A, volume constant ⇒ A ∝ 1/L
R ∝ L² ⇒ 3² = 9R
➡️ Correct Answer: C. 9R
4. The work done by centripetal force on a particle moving in a circle is:
A. Maximum
B. Minimum
C. Zero
D. Infinite
✅ Answer: C
📘 Explanation: Force ⟂ displacement.
5. Assertion (A): Momentum of a system remains conserved in absence of external force.
Reason (R): Internal forces occur in equal and opposite pairs.
A. Both true, R correct explanation
B. Both true, R not explanation
C. A true, R false
D. A false, R true
✅ Answer: A
6. The SI unit of electric field intensity is:
A. N/C
B. V
C. C/N
D. J
✅ Answer: A
📘 Explanation: Electric field = Force/charge.
7. When temperature of a conductor increases, its resistance:
A. Decreases
B. Increases
C. Becomes zero
D. Remains same
✅ Answer: B
8. The time period of a simple pendulum depends on:
A. Mass of bob
B. Length of string
C. Shape of bob
D. Amplitude (large)
✅ Answer: B
📘 Explanation: T = 2π√(L/g).
9. Which phenomenon proves wave nature of light?
A. Photoelectric effect
B. Compton effect
C. Interference
D. Photo emission
✅ Answer: C
10. A transformer increases voltage. What happens to current?
A. Increases
B. Decreases
C. Remains same
D. Zero
✅ Answer: B
11. Assertion (A): Sound cannot travel through vacuum.
Reason (R): Sound waves are longitudinal mechanical waves.
A. Both true, R correct explanation
B. Both true, R not explanation
C. A true, R false
D. A false, R true
✅ Answer: A
12. The refractive index of glass is maximum for:
A. Red
B. Yellow
C. Blue
D. Violet
✅ Answer: D
13. Which electromagnetic wave has highest energy?
A. X-rays
B. Gamma rays
C. Ultraviolet
D. Infrared
✅ Answer: B
14. The phenomenon responsible for mirage is:
A. Reflection
B. Refraction
C. Diffraction
D. Total internal reflection
✅ Answer: D
15. The SI unit of magnetic flux is:
A. Tesla
B. Weber
C. Henry
D. Ampere
✅ Answer: B
16. A satellite appears weightless because:
A. No gravity
B. Zero mass
C. Free fall
D. No atmosphere
✅ Answer: C
17. The efficiency of a Carnot engine depends on:
A. Nature of working substance
B. Pressure
C. Temperature of source and sink
D. Volume
✅ Answer: C
18. Which law gives direction of induced current?
A. Faraday’s law
B. Fleming’s right-hand rule
C. Lenz’s law
D. Ohm’s law
✅ Answer: C
19. The pitch of sound depends on:
A. Amplitude
B. Frequency
C. Velocity
D. Intensity
✅ Answer: B
20. Which effect confirms particle nature of light?
A. Interference
B. Diffraction
C. Polarization
D. Photoelectric effect
✅ Answer: D
Thank you for visiting! We wish you the absolute best of luck in your studies!
