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Max. Marks: 100

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Pages: 3

Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
B.Tech Degree S1,S2(S,FE) Examination May 2021(2015 Scheme)

Course Code: PH100
Course Name: ENGINEERING PHYSICS

PARTA
Answer all questions, each carries 2 marks.

What is the effect of damping on the angular frequency and time period of an
oscillator?
Define wavelength and frequency of a wave.

What is an interference filter?

What is Rayleigh’s criterion for resolution?

Differentiate between circularly polarized light and elliptically polarized light.
What are Cooper pairs in superconductors?

State and explain Heisenberg’s uncertainty principle

Even at very low temperatures, fermions do not condense into the lowest energy
of the system. Why?
Distinguish between musical sound and noise.

What are ultrasonic waves ?Give any two properties of them
What is population inversion? Give its importance in laser.

What is photovoltaic effect?

PART छ
Answer any 10 questions, each carries 4 marks.

Compare electrical and mechanical oscillators.

A rope of mass 0.55Kg is stretched between two supports 30 m apart. If the
tension in the rope is 150N. What time will a pulse take to travel from one
support to the other?

Interference fringes are formed in a thin air wedge using sodium light of
wavelength 5893A. When observed normally, 10 fringes are found in a distance

of 1 cm. Calculate angle of the wedge.

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Duration: 3 Hours

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