Passion of Physics ... A Journey Through Space-Time ...: July 2018

Analog Electronics - I Internal Test

Analog Electronics - 4BPH5C1

I Internal Test

Time : 2 Hrs Marks: 40

PART - A 5 x 2 = 10

1.What are extrinsic semiconductors?

2.What is a crystal diode?

3.Define ripple factor.

4.Define current gain of a transistor in CC mode.

5.Define operating point of a transistor.

PART - B 2 x 5 = 10

1. Describe the working of a Zener voltage regulator.
2. Derive relation between alpha and beta.

PART - C 2 x 10 = 20

1.Describe the working of a full wave bridge rectifier.
2.Write an essay on load line analysis of transistor circuits.

Optics and Spectroscopy - I Internal Test

Optics and Spectroscopy - 7BPH3C1

I Internal Test

Time : 2 Hrs Marks: 40

PART - A 5 x 2 = 10

1. Write short note on chromatic aberration in lenses.

2. Define dispersive power of a material.

3. What is an achromatic doublet?

4. State Stoke's Law.

5. What is an air wedge?

PART - B 2 x 5 = 10

1. Derive the condition for the minimization of Spherical Aberration when two thin lenses are separated by a distance.
2. Explain how colors appear in thin films due to interference.

PART - C 2 x 10 = 20

1. Explain the construction, action and working of Ramsden and Huygens Eyepieces with neat diagrams. Also indicate the position of cardinal points for these eyepieces.
2. Explain the construction of Michelson Interferometer. How the wavelength of monochromatic light can be measured?