Class 11 Physics · Chapter 12 · Test 2
Quarks and Standard Model
47 MCQs This test covers alpha, beta and gamma decay with their spectra, hadrons, leptons, fermions and bosons, and the quark model. It also covers quark content of the proton and neutron, colour charge, beta decay in terms of quarks, the Higgs boson, conservation laws, dark matter, plasma, string theory and the Standard Model.
47 questions · 40 min · 47 marks
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Sample questions
The first 5 of 47. Try each one, then tap to see the answer.
Question 1
Nuclei with atomic number greater than 82 are generally:
- AStable
- BUnstable and radioactive
- CNeutral
- DLighter than hydrogen
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Answer: B
They are naturally unstable and emit radiation.
Question 2
Artificial radioactivity is produced by:
- ACooling a stable nucleus
- BBombarding a stable nucleus with high energy particles
- CHeating it slowly
- DRemoving its electrons
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Answer: B
Bombardment makes a stable nucleus unstable so it emits radiation.
Question 3
Alpha particles are deflected towards the negative plate in an electric field because they are:
- ANegatively charged
- BNeutral
- CPositively charged
- DMassless
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Answer: C
They carry a positive charge.
Question 4
Beta particles are deflected more than alpha particles because they are:
- AHeavier
- BLighter
- CNeutral
- DFaster than light
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Answer: B
Beta particles are electrons which are much lighter than alpha particles.
Question 5
Which radiation is not deflected by an electric field?
- AAlpha
- BBeta
- CGamma
- DBoth alpha and beta
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Answer: C
Gamma rays are neutral electromagnetic radiation.
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