Class 12
Physics
Suggested Investigatory projects
( CBSE)
1. To study the variations in current flowing in a circuit containing an LDR because of a variation in(a)
the power of the incandescent lamp, used to 'illuminate' the LDR (keeping all the lamps at a fixed
distance).
(b) the distance of a incandescent lamp (of fixed power) used to 'illuminate' the LDR.
2. To find the refractive indices of (a) water (b) oil (transparent) using a plane mirror, an equiconvex
lens (made from a glass of known refractive index) and an adjustable object needle.
3. 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.
4. 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.
5. To estimate the charge induced on each one of the two identical Styrofoam (or pith) balls suspended
in a vertical plane by making use of Coulomb's law.
6. 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 anA.C. source of adjustable
frequency.
7. To study the earth's magnetic field using a compass needle -bar magnet by plotting magnetic field
lines and tangent galvanometer.
8 To study refractive index of different liquids using hollow glass prism.
9. To study magnetic field of earth using tangent galvanometer.
10. To study the lateral shift using glass slab.
11. To design a full wave rectifier/ Half wave rectifier
12. To study phenomena of Total internal reflection of light
13. To study resistance/ resistivity of different wires ( at least three)
14 .To study phenomena of EMI
15.To study phenomena of Mutual inductance
16.To study magnetic effect of current by orested experiment
