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As you all know, CBSE has reintroduced investigatory projects in Physics and it will be part of evaluation in Practical exams this year onwards. Here, we would like to answer some of the frequently asked queries. If you have any query please post them as comments to this post.
Q. Will the viva-voce contain questions related to the investigatory project?
A. Yes. The external examiners are instructed to ask questions related to investigatory projects also so as to ascertain the genuineness of the project. The marks assigned to project are mainly based on how you answer the questions related to the project.
Q. Can I do some construction of electronic gadgets as my investigatory project?
A. As the name suggests, the project must be investigatory, ie, you must investigate on some properties or phenomena. Please see the sample projects given by CBSE.
SUGGESTED INVESTIGATORY PROJECTS
1 To study various factors on which the internal resistance/emf of a cell depends.
2. To study the variations, in current flowing, in a circuit containing a LDR, because of a variation.
(a) in the power of the incandescent lamp, used to ‘illuminate’ the LDR. (Keeping all the lamps at a fixed distance).
(b) in the distance of a incandescent lamp, (of fixed power), used to ‘illuminate’ the LDR.
3. To find the refractive indices of (a) water (b) oil (transparent) using a plane mirror, a equiconvex lens, (made from a glass of known refractive index) and an adjustable object needle.
4. To design an appropriate logic gate combinatin for a given truth table.
5. To investigate the relation between the ratio of (i) output and input voltage and
(ii) number of turns in the secondary coil and primary coil of a self designed transformer.
6. To investigate the dependence, of the angle of deviation, on the angle of incidence, using a hollow prism filled, one by one, with different transparent fluids.
7. To estimate the charge induced on each one of the two identical styro foam (or pith) balls suspended in a vertical plane by making use of Coulomb’s law.
8. To set up a common base transistor circuit and to study its input and output characteristic and to calculate its current gain.
9. To study the factor, on which the self inductance, of a coil, depends, by observing the effect of this coil, when put in series with a resistor/(bulb) in a circuit fed up by an a.c. source of adjustable frequency.
10. To construct a switch using a transistor and to draw the graph between the input and output voltage and mark the cut-off, saturation and active regions.
11. To study the earth’s magnetic field using a tangent galvanometer.