KHYBER PAKHTOON KHWA PUBLIC SERVICE COMMISSION, PESHAWAR
SUBJECT:- COMPETITIVE EXAMINATION FOR THE POSTS OF PROVINCIAL MANAGEMENT 2013
SERVICE(BPS-17)
PHYSICS PAPER-II
Time Allowed: 03 hours
Max. Marks:100
Note: Attempt any five complete questions.
Q 1 (a) Explain the mechanism of energy storage in a capacitor. What is a dielectric and why it is used in a capacitor? (6,4)
(b) State and explain the Faraday’s law of induction. What is Lenz’ law? (2,5,3)
Q 2 (a) What is Ampere’s law? Use this law to show that, magnetic field inside a solenoid is uniform over its cross-section. (4,6)
(b) Define magnetization and give an account of diamagnetism, and ferromagnetism. (2,8)
Q 3 (a) What is natural radioactivity? Explain the alpha decay and beta decay. (2,4,4)
(b) What is a particle accelerator and what is its use? Explain the construction and working of Van de Graaff generator. (2,1,7)
Q 4 (a) What are the main parts of a pressurized water reactor? Describe the process of release of energy in a nuclear fission. (4,6)
(b) Give an account of leptons, mesons, and baryons. State the law of conservation of lepton number. (8,2)
Q 5 (a) What is thermionic emission and on what factors does it depend? Describe the use of a diode valve as a rectifier. (5,5)
(b) What is modulation and what are its types? Explain the amplitude modulation. (2,2,6)
Q 6 (a) What are intrinsic and extrinsic semiconductors? Describe the formation and functioning of a p-n junction under forward and reverse biasing. (4,6)
(b) What is the difference between a triode valve and a semiconductor transistor? Explain the use of a junction transistor under normal operation (3,7)
Q 7 (a) What are the basic postulates of Bohr’s atomic theory? State and explain Pauli’s exclusion principle. (4,6)
(b) What is pair production? Describe the experiment which verifies that particles can behave as waves. (3,7)
Q 8 (a) What is the difference between normal Zeeman effect and anomalous Zeeman effect? Explain the mechanism of production of laser light. (3,7)
(b) State and discuss Heisenberg’s uncertainty principle.
Give an account of the Schrodinger’s wave equation. (5,5)
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