Punjab Public Service Commission — Complete MCQ Bank
PPSC examinations recruit candidates for Punjab government departments and commonly test general knowledge, current affairs, English and post-related subjects.
Which phenomenon explains why the sky appears blue?
What is the half-life of a radioactive substance?
Which type of radiation consists of helium nuclei emitted from an unstable nucleus?
Which type of radiation has the highest penetrating power?
What is the Doppler effect in the context of sound waves?
Which experiment proved that the atom has a small dense positively charged nucleus?
Which model of the atom describes electrons orbiting the nucleus in specific energy levels?
What is the name of the quantum of electromagnetic radiation?
Who explained the photoelectric effect and won the Nobel Prize for it in 1921?
Which effect describes the emission of electrons from a metal surface when light of sufficient frequency falls on it?