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Class 12 Physics — Chapter 11: Dual Nature of Radiation and Matter
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Free NCERT-aligned multiple-choice practice for Class 12 Physics, Chapter 11 (Dual Nature of Radiation and Matter). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.
Sample questions
Q1Easy
Photoelectric effect Nobel went to:
A.Einstein✓ correct
B.Bohr
C.Planck
D.Curie
Why
1921 Physics Nobel.
Q2Medium
Below threshold frequency, photoelectrons:
A.Are not emitted regardless of intensity✓ correct
B.Are emitted with low energy
C.Increase with intensity
D.Always emitted
Why
Energy of photon < work function.
Q3Hard
Photons of energies 4 eV and 6 eV on metal of φ = 2 eV. Ratio of KE_max values:
A.1:2✓ correct
B.2:3
C.1:3
D.3:4
Why
(4−2):(6−2) = 2:4 = 1:2.
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