Skip to content
Book Free Demo

Modern Physics and Everyday Devices – GK Quiz with Answers – Level 3

Hard-level physics GK on the discovery timeline from radioactivity to the neutron, half-life, fission and fusion, semiconductors, and devices like photocells, rectifiers and LEDs, with explanations.

Start Test

Choose Normal practice or a Simulated test.

Questions, answer key and solutions.

Questions
50
Duration
35 min
Marks
50

Negative marking

Attempts
100
Access
Free
Share test:

Normal practice, or a Simulated test

Both use the same questions. Normal practice is untimed and needs no account: choose an option and the answer and solution appear at once. The Simulated test is the real computer-based format, with one 35-minute clock, a question palette and full screen, and your score, the key and the solutions arrive when you submit.

Open Normal practiceTake the Simulated test
How the two modes differ
No account needed

Normal

Untimed

Every question on one page, loading as you scroll. Choose an option and see straight away whether it was right.

  • No timer. Nothing to start and nothing to submit. Stop whenever you like.
  • Answered as you choose. Tap an option and it is marked at once, with the correct answer shown.
  • Solutions in place. The explanation, and the video where one has been added, sit under the question.
  • Open to guests. Normal practice needs no sign-in.
Real exam conditions

Simulated

Timed CBT

The computer-based test format: one clock, a question palette, and a score the moment you submit.

  • A clock that does not pause. 35 minutes from the moment you begin, and the paper is submitted for you when it reaches zero.
  • Question palette. Answered, not answered and marked for review, section by section, as the real interface has it.
  • Full screen, proctored. The test takes over the screen; leaving it three times submits the paper.
  • Answers hidden until you submit. The key, the explanations and your score all arrive together at the end.

About this test

Modern Physics GK Practice Quiz Level 3: Atoms, Nuclei and Everyday Devices

This Level 3 General Awareness quiz checks how firmly you hold modern physics facts: the order of key discoveries, radioactive decay and half-life, nuclear fission and fusion, and the working of semiconductor devices. Aptitude360 built this hard-level set around chronology, statement checks and list matching, with a written explanation for every question.

Topics covered in this modern physics GK set

  • Chronology of discoveries, from radioactivity and the electron to the neutron
  • Contributions of Becquerel, Thomson, Rutherford, Bohr, Einstein and Chadwick
  • Photoelectric effect, mass-energy equivalence and Einstein's Nobel Prize
  • Alpha, beta and gamma decay, with half-life fraction questions
  • Nuclear fission of heavy nuclei, and fusion as the Sun's energy source
  • p-type and n-type semiconductors, photocells, rectifiers, LEDs and solar cells

Key concepts to revise for modern physics GK

  • The experiment behind each finding: cathode rays for the electron, alpha particle scattering for the nucleus
  • Doping: trivalent impurities give p-type material and pentavalent impurities give n-type material
  • Energy conversions in devices, such as light to electricity in a solar cell and AC to DC in a rectifier
  • Why a photocell is called an electric eye and how it switches automatic street lights

Revision tips for physics discoveries and devices

  • Build one timeline of discovery years and practise ordering the events and spotting consecutive years
  • For half-life questions, halve the remaining amount once for every half-life that passes
  • Keep a scientist-to-contribution table and quiz yourself in both directions

Who should take this Level 3 set

General Awareness learners who are comfortable with basic physics facts and want harder statement and matching practice on modern physics and everyday devices.

FAQs about Modern Physics and Everyday Devices – GK Quiz with Answers – Level 3

Who discovered radioactivity?
Henri Becquerel discovered radioactivity in 1896 while studying uranium salts. Marie and Pierre Curie carried the work further and discovered polonium and radium.
Why did Einstein get the Nobel Prize?
Albert Einstein received the 1921 Nobel Prize in Physics for his services to theoretical physics and especially for explaining the photoelectric effect. He did not receive it for the theory of relativity.
What is the difference between nuclear fission and fusion?
In fission, a heavy nucleus such as uranium splits into lighter nuclei when struck by a neutron. In fusion, light nuclei such as hydrogen combine to form a heavier nucleus, which is the process that powers the Sun.
What is the difference between p-type and n-type semiconductors?
A p-type semiconductor is made by adding a trivalent impurity such as boron, so holes are the majority carriers. An n-type semiconductor is made by adding a pentavalent impurity such as phosphorus, so electrons are the majority carriers.

Test structure

How the paper is split, and how long each part runs. A section you have finished cannot be returned to.

SectionQuestionsTime
Modern Physics and Everyday Devices GK Level 35035 min

Marking & rules

Total marks
50 across 50 questions.
Negative marking
A wrong answer costs marks. Leaving a question unanswered costs nothing.
Attempts
100 in total. An attempt is spent the moment you begin one.

What you get when you submit

The analysis is ready the moment you submit the paper.

Score and accuracy

Marks, percentage, right, wrong and skipped, and the time you took.

Section by section

The same figures for each section, so a weak one cannot hide in an average.

The full answer key

Every question with your answer, the right one, the working, and the video where there is one.

Where you stand

Your score against the spread of everyone else who has sat this test.

Recommended courses for CAT & OMET

All CAT & OMET courses
Chat with an academic counsellor on WhatsApp