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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST/SECOND SEMESTER B.TECH DEGREE EXAMINATION, JULY 2016
211100 ENGINEERING PHYSICS
Max. Marks: 100 Duration: 3 Hours
Part-A ۱
Answer all questions, Each question carries 2 marks.

What is the effect of damping on the frequency and time period of an oscillator?
Distinguish between longitudinal waves and transverse waves.

Write the expression for the radius of the ஈட dark ring in Newton's rings interference
pattern. What happens to this radius when air is replaced by a liquid of refractive index
ப.

Define resolving power of grating.

What is a half wave plate? Write the expression for its thickness,

What is DC Josephson effect?

What is quantum mechanical tunneling?

What do you mean by Fermi level of a system?

Define absorption co-efficient of sound.

What is piezo electric effect?

What is metastable state. How it is significant in the production of laser?

What is a phototransistor?

Part-B
Answer any 10 questions. Each question carries 4 marks

What is the condition for over damping in the case of a damped harmonic oscillator?
With the help of displacement-time graph write how this condition affect the amplitude
of the oscillator?

A string when stretched by a weight of 4kg gives a note of frequency 256 Hz. What

- weight will produce a frequency twice the above frequency?

What is an interference filter? How is it constructed?

A parallel beam of monochromatic light falling normally on a diffraction grating

produces a deviation of 14° 431 in the second order. If the grating has 5200 lines/cm

calculate the wavelength of the monochromatic radiation |
A plane polarized light ग 2-60004 is incident on a quartz-crystal and-parallel to the

axis. If the refractive indices of the crystal for "ಕಾ ray are 1 548