Physics Viva Questions

1. Physics Viva Questions
   
2. State the Principle of a potentiometer. (The students say that potential drop is proportional to length but the constant quantities are not mentioned)
3. How can we increase the sensitivity of a potentiometer?
4. Define figure of merit of a galvanometer.
5. Which has more resistance – a galvanometer or a milliammeter?
6. How does an LED emit light?
7. What is the difference between an ordinary diode and an LED?
8. Define principal axis of a convex lens?
9. What happens to the focal length of a concave mirror if it is immersed in water?
10. What are the factors affecting the internal resistance of a cell?
11. What are the difference between primary and secondary cell?
12. Why can’t we use a dry cell for starting a car?
13. What happens to the resistivity of a wire when it is doublefolded?
14. How does the resistance of a wire depend on its dimensions?
15. Why are the resistances used in a resistance box is like 1,2,2,5,10,20,20,50,100,200,200,500,1000,2000,2000,5000 etc?
16. Why constantan or manganin wires are used for making the resistance coils in resistance box?
17. What is a standard resistance?
18. What are the characteristics of a standard resistance?
19. What are the precautions to be observed while doing electricity experiments in general?
20. What is a galvanometer?
21. What is the resistance of an ideal ammeter?
22. Why is ammeter always connected in series and voltmeter always connected in parallel?
23. How can we convert a galvanometer into an ammeter or a voltmeter?
24. What is shunt?
25. What is AVO meter?
26. What is the effect of temperature on the resistance of a conductor?
27. Why does the resistance of a conductor increases with temperature, whereas that of a semiconductor decreases with temperature.
28. What is conductance?
29. What are non ohmic devices? give an example.
30. What are superconductors?
31. Define emf
32. Why emf is said to be a misnomer?
33. What happens if the battery used in the primary circuit of a potentiometer has less emf compared to the emf of the cell used in the secondary circuit?
34. If you find that the galvanometer reading is shaky, what error can you expect?
35. What do you mean by figure of merit of a galvanometer?
36. Why a moving coil galvanometer is called so?
37. What is the principle of a galvanometer?

Jntu ENGINEERING PHYSICS ENGINEERING CHEMISTRY LAB Syllabus

ENGINEERING PHYSICS / ENGINEERING CHEMISTRY LAB
ENGINEERING PHYSICS LAB(Any twelve experiments compulsory)
1.Dispersive power of the material of a prism Spectrometer
2.Determination of wavelength of a source Diffraction Grating.
3.Newton s Rings - Radius of curvature of plano convex lens.
4.Melde s experiment Transverse and longitudinal modes.
5.Time constant of an R-C circuit.
6.L-C-R circuit.
7.Magnetic field along the axis of current carrying coil Stewart and Gees method.
8.Study the characteristics of LED and LASER sources.
9.Study the characteristics of p-i-n and avalanche photodiode detectors.
10.Bending losses of fibres.
11.Evaluation of numerical aperture of given fibre.
12.Energy gap of a material of p-n junction.
13.Thermo electric effect Seebeck effect and Peltier effect.
14.Torsional pendulum.
15.Single slit diffraction using laser.
ENGINEERING CHEMISTRY LAB
List of Experiments (Any 12 of the following):
Titrimetry: TOP
1Estimation of hardness of water by EDTA method. (or)Estimation of calcium in limestone by Permanganometry.
Mineral Analysis:
2 Determination of percentage of copper in brass3 Estimation of manganese dioxide in pyrolusite.
Instrumental Methods:
1.Colorimetry:Determination of ferrous iron in cement by colorimetric method.(Or) Estimation of Copper by Colorimetric method.
2.Conductometry:Conductometric titration of strong acid Vs strong base.(or) Conductometric titration of mixture of acids Vs strong base.
3.Potentiometry:
Titration of strong acid Vs strong base by potentiometry.(or) Titration of weak acid Vs strong base by potentiometry.
Physical Properties:
1.Determination of viscosity of sample oil by redwood/oswald s viscometer
2.Determination Surface Tension of lubricants.
Identification and Preparations:
1.Identification of functional groups present in organic compounds.
2.Preparation of organic compoundsAsprin (or) Benzimidazole
Kinetics:
1.To determine the rate constant of hydrolysis of methyl acetate catalysed by an acid and also the energy of activation. (or) To study the kinetics of reaction between K2S2O8 and KI.
1.Demonstration Experiments ( Any One of the following) :
1.Determination of dissociation constant of weak acid-by PH metry
2.Preparation of Thiokol rubber
3.Adsorption on Charcoal
4.Heat of reaction
TEXT BOOKS:
1.Practical Engineering Chemistry by K. Mukkanti, etal, B.S. Publications, Hyderabad.
2.Inorganic quantitative analysis, Vogel.
REFERENCE BOOKS:
1.Text Book of engineering chemistry by R. N. Goyal and Harrmendra Goel.
2.A text book on experiments and calculation Engg. S.S. Dara.
3.Instrumental methods of chemical analysis, Chatwal, Anand, Himalaya Publications.
Download the documnt version of syllabus click here