CBSE 12th Physics Core Concepts Quiz
Test your understanding of key physics concepts from the CBSE 12th board syllabus
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Quiz Questions & Answers
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Question 1: Which electromagnetic wave has the shortest wavelength?
Ultraviolet rays
X-rays
Gamma rays
Infrared rays
Question 2: What happens to the resistance of a semiconductor when temperature increases?
Increases
Decreases
Remains constant
Becomes zero
Question 3: In a p-n junction diode, what causes the depletion region?
Diffusion of charge carriers
Applied voltage
Temperature change
Doping concentration
Question 4: Which principle explains the working of a transformer?
Coulomb's law
Electromagnetic induction
Photoelectric effect
Ampere's law
Question 5: What is the function of a moderator in a nuclear reactor?
Generate electricity
Control chain reaction
Slow down neutrons
Cool the reactor
Question 6: Which phenomenon explains the blue color of the sky?
Reflection
Rayleigh scattering
Diffraction
Interference
Question 7: What is the role of the Einstein's photoelectric equation?
Describes atomic structure
Explains wave nature of light
Relates kinetic energy of photoelectrons to frequency
Calculates atomic mass
Question 8: In an AC circuit, what happens when inductive reactance equals capacitive reactance?
Circuit becomes open
Resonance occurs
Current becomes zero
Voltage doubles