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Reg. No.: Name: ١
FIRST SEMESTER B.TECH DEGREE EXAMINATION, JANUARY 2016
Course Code: PH100
Course Name: ENGINEERING PHYSICS
Max. Marks: 100 Duration: 3 Hours

16.

Part A
Answer ALL questions. Each question carries 2 marks

What do you :nean by quality factor of an oscillator?

What is the relation between path difference and phase difference in wave motion?
Two independent sources of light cannot produce interference fringes. Why?
Define dispersive power of a grating.

Distinguish between plane polarized light and unpolarized light.

What is Meissner effect?

What is phase space?

What is the probability interpretation of wave function?

What is the relation connecting reverberation time and total absorption?
What is magnetostriction effect?

Write any two advantages of Hologram over photographic images.

Distinguish between Step index fibre and Graded index fibre.

Part B

Answer any 10 questions. Each question carries 4 marks

Compare an electrical and mechanical oscillator.

A transverse wave on a stretched string is described by
y(x, 0) 54.0 sin (25t+0.016x+2/3) where x and y are in cm and t is in second.

Obtain the (i) Speed (ii) Amplitude (iii) Frequency and(iv)Initial phase at the origin.

With Newton’s rings arrangement, nth dark ring formed by light of wavelength 6000 A°
coincides with the (n+1)" dark ring for light of wavelength 450047. If the radius of curvature of
the convex surface is 90 cm, find the diameter of the nth ring for light wavelength 6000 A’.

A plane transmission grating has 6000 lines/cm. Find the angular separation between two

wavelengths 500 nm and 510 nm in the 3" order.