12th Class Physics Quiz Ranking Challenge [March 2026]

Join the free 12th Class Physics Quiz Ranking Challenge! Solve 20 NCERT/CBSE-based physics questions in 30 minutes. Ideal for revision, practice, and testing your knowledge.

Time: 30 Minutes for 20 Question.

Class 12th Physics Monthly Quiz Challenge

The number of attempts remaining is 1

1. Charge is the property associated with matter due to which it produces and experiences

electric effects only

magnetic effects only

both electric and magnetic effects

None of these

2. Of the following about capacitive reactance which is correct?

The reactance of the capacitor is directly proportional to its ability to store charge

Capacitive reactance is inversely proportional to the frequency of the current

Capacitive reactance is measured in farad

The reactance of a capacitor in an A.C. circuit is similar to the resistance of a capacitor in a D.C. circuit

3. At magnetic poles, the angle of dip is

45º

30º

zero

90º

4. In an n-type semiconductor, donor valence band is

above the conduction band of the host crystal

close to the valence band of the host crystal

close to the conduction band of the host crystal

below the valence band of the host crystal

5. Alternating current can not be measured by D.C. ammeter, because

A. C. is virtual

A. C. changes its direction

A. C. can not pass through D.C. ammeter

average value of A. C for complete cycle is zero

6. 12 signals each band limited to 5 kHz are to be transmitted by frequency-division multiplexer. If AM-SSB modulation guard band of 1 kHz is used then the bandwidth of multiplexed signal is

101 kHz

99 kHz

84 kHz

71 kHz

7. Phase difference between voltage and current in a capacitor in an ac circuit is

π/2

(d)π/3

8. Photoelectric effect can be explained by

wave theory of light

Bohr’s theory

quantum theory of light

corpuscular theory of light

9. A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system

decreases by a factor of 2

remains the same

increases by a factor of 2

increases by a factor of 4

10. Which of the following is correct for the beam which enters the medium?

Travel as a cylindrical beam

Diverge

Converge

Diverge near the axis and converge near the periphery

11. A capacitor acts as an infinite resistance for

DC as well as AC

neither AC nor DC

12. Which of the following is not due to total internal reflection?

Working of optical fibre

Difference between apparent and real depth of pond

Mirage on hot summer days

Brilliance of diamond

13. A transformer is based on the principle of

mutual induction

self induction

Ampere’s law

X-ray crystallography

14. Which of the following is drawback of amplitude modulation?

low efficiency

noise reception

operating range is small

all of these

15. A point charge is kept at the centre of metallic insulated spherical shell. Then

electric field out side the sphere is zero

electric field inside the sphere is zero

net induced charge on the sphere is zero

electric potential inside the sphere is zero

16. When light is refracted into a medium,

its wavelength and frequency both increase

its wavelength increases but frequency remains unchanged

its wavelength decreases but frequency remains unchanged

its wavelength and frequency both decrease

17. The drift current in a p-n junction is from the

n-side to the p-side

p-side to the n-side

n-side to the p-side if the junction is forward-biased and in the opposite direction if it is reverse biased

p-side to the n-side if the junction is forward-biased and in the opposite direction if it is reverse-biased

18. Television signals are

frequency modulated

amplitude modulated

both frequency and amplitude modulated

phase modulated

19. The photoelectric current does not depend upon the
(i) frequency of incident light
(ii) work function of the metal
(iii) stopping potential
(iv) intensity of incident light

(i) and (iv) only

(ii) and (iii) only

(iii) only

(ii) only

20. A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It will

stay in north-south direction only

stay in east-west direction only

become rigid showing no movement

stay in any position

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Climb the ranks, test your knowledge, and challenge yourself every month! Compete with your school friends and national-level students.

FAQs – 12th Class Physics Quiz Ranking Challenge

Q1. Who can participate in the 12th Class Physics Quiz Ranking Challenge?

All Class 12 students studying under the NCERT/CBSE curriculum can participate in this free physics quiz challenge.

Q2. How many questions are included in the quiz?

The quiz consists of 20 physics-based multiple-choice questions from the NCERT Class 12 syllabus.

Q3. What is the time limit for completing the quiz?

You will get a total of 30 minutes to answer all 20 questions.

Q4. Why are quiz answers not shown after completion?

Answers are not displayed because the quiz is designed for self-study. Students can revise the syllabus, practice again, and attempt the ranking challenge in the next month’s round.

Q5. Is there any registration fee for the quiz?

No, this quiz is completely free. Any Class 12 student can join and test their physics knowledge without paying anything.

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