12th Class Physics Quiz Ranking Challenge [April 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. In PCM if the transmission path is very long

pulse spacing is reduced

pulse amplitude is increased

pulse width is increased

repeater stations are used.

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

low efficiency

noise reception

operating range is small

all of these

3. In an insulator, the forbidden energy gap between the valence band and conduction band is of the order of

1 MeV

0.1 MeV

1 eV

5 eV

4. 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

5. Figure shows electric field lines in which an electric dipole P is placed as shown. Which of the following statements is correct?

The dipole will not experience any force

The dipole will experience a force towards right

The dipole will experience a force towards left

The dipole will experience a force upwards

6. Two spheres A and B of exactly same mass are given equal positive and negative charges respectively. Their masses after charging

remains unaffected

mass of A > mass of B

mass of A < mass of B

Nothing can be said

7. In Einstein’s picture of Photoelectric emission, the photoelectric emission does not take place by

continuous emission of energy from radiation

continuous absorption of energy from radiation

discrete absorption of energy from radiation

discrete emission of energy from radiation

8. The electric field inside a spherical shell of uniform surface charge density is

zero

constant different from zero

proportional to the distance from the curve

None of the above

9. 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

10. 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

11. A capacitor acts as an infinite resistance for

DC as well as AC

neither AC nor DC

12. When light is refracted, which of the following does not change?

Wavelength

Frequency

Velocity

Amplitude

13. 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

14. 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

15. Coulomb’s law is true for

atomic distances (= 10^–11 m)

nuclear distances (= 10^–15 m)

charged as well as uncharged particles

all the distances

16. Hysterisis is the phenomenon of lagging of

I behind B

B behind I

I and B behind H

H behind I

17. 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

18. Sensitivity of potentiometer can be increased by

increasing the e.m.f of the cell

increasing the length of the potentiometer

decreasing the length of the potentiometer wire

None of these

19. 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

20. The mobility of free electrons is greater than that of free holes because

they are light

they carry negative charge

they mutually colllide less

they require low energy to continue their motion

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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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