sics Practical Exam Viva VoceHi Students!The practical
examinations are accompanied by viva voce by the external/internal
examiner to ensure the genuineness of their work and toanalysethe
understanding of the subject by the students.So it is important to
prove yourself by performing well in theviva voce.The following
questions will be of some help to prepare well for it. Please
remember that the questions following the first is based on your
answer to the first question. (However, there are some examiners
who come with some questions written on their diary or paper and
blindly ask from them. For them, please prepare the questions which
are printed on the practical manual.)Questions based on screw gauge
experiments1. Define leastcount of a screw gauge2. Define pitch3.
What is backlash error? How is it avoided?4. What is zero error?
How is it determined?5. When do you say that the zero error is
positive or negative?6. What are random errors? How can you
minimise them?7. What is the use of ratchet in a screw
gauge?Questions based on vernier calipers experiments
using the vernier caliper to measure a nut (Photo credit:
Wikipedia)1. Define vernier constant?2. What is the principle of a
vernier?3. How is the least count of a vernier calipers
determined?4. What are thecommonsources of erroroccurringin using a
vernier?5. What are the precautions to be observed while using
vernier?6. What is parallax error? How can it be avoided?7. What
are the uses of a vernier calipers?8. How will youdeterminethe
volume of an irregular glass plate using vernier?Questions based on
simple pendulum experiments
Simple pendulum (Photo credit: Wikipedia)1. What is a simple
pendulum?2. Define time period of a simple pendulum.3. Define
effective length of a simple pendulum.4. What are the factors
affecting the time period of a simple pendulum?5. How does altitude
from the surface of earth affect the time period of a simple
pendulum?6. What is a seconds pendulum?7. What is the effective
length of a seconds pendulum?8. Define SHM.9. Why should the
oscillations of the simple pendulum must be of small amplitude?10.
What are the precautions to be observed while doing the simple
pendulum experiment?11. What is the shape of LT^2 graph?12. What is
the shape of L-T graph?13. Define point of oscillation of a simple
pendulum.Questions based on Hookes Law/Spring constant/helical
spring experiments1. State Hookes Law2. Define spring constant3.
What is restoring force?4. What is the shape of load extension
graph?5. How do you find the spring constant from the load
extension graph?6. Define elasticity?7. What do you mean by modulus
of elasticity?8. Which is more elastic steel of rubber?
Why?Questions based on parallelogram law/concurrent forces
experiments1. What are concurrent forces?2. State parallelogram law
of forces.3. What do you mean by resultant of a no. of forces?4.
What do you mean by equilibrant?5. What are the conditions for
translational and rotational equilibrium?6. State triangle law of
forces.7. Define force.8. What areco-planarforces?9. What is the
minimum no. of nonco-planarforces required to keep a body in
equilibrium?10. What is the minimum no. of noncollinearforces
required to keep a body in equilibriumhysics Viva Questions1. State
the Principle of a potentiometer. (The students say that potential
drop is proportional to length but the constant quantities are not
mentioned)2. How can we increase the sensitivity of a
potentiometer?3. Define figure of merit of a galvanometer.4. Which
has more resistance a galvanometer or a milliammeter?5. How does an
LED emit light?6. What is the difference between an ordinary diode
and an LED?7. Define principal axis of a convex lens?8. What
happens to the focal length of a concave mirror if it is immersed
in water?9. What are the factors affecting theinternalresistance of
a cell?10. What are the difference between primary and secondary
cell?11. Why cant we use a dry cell for starting a car?12. What
happens to the resistivity of a wire when it is doublefolded?13.
How does the resistance of a wire depend on its dimensions?14. 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?15. Why
constantan or manganin wires are used for making the resistance
coils in resistance box?16. What is a standard resistance?17. What
are the characteristics of a standard resistance?18. What are the
precautions to be observed while doing electricity experiments in
general?19. What is a galvanometer?20. What is the resistance of an
ideal ammeter?21. Why is ammeter always connected in series and
voltmeter always connected in parallel?22. How can we convert a
galvanometer into an ammeter or a voltmeter?23. What is shunt?24.
What is AVO meter?25. What is the effect of temperature on the
resistance of a conductor?26. Why does the resistance of a
conductor increases with temperature, whereas that of a
semiconductor decreases with temperature.27. What is
conductance?28. What are non ohmic devices? give an example.29.
What are superconductors?30. Define emf31. Why emf is said to be a
misnomer?32. 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?33. If you find that the
galvanometer reading is shaky, what error can you expect?34. What
do you mean by figure of merit of a galvanometer?35. Why a moving
coil galvanometer is called so?36. What is the principle of a
galvanometer