
 EVALUATION SCHEME FOR PRACTICAL EXAMINATIONS OF CLASS XII MARCH 2013
Two experiment (One from each section) 8+8 marks
Practical record (experiments & activities) 6 marks
Project 3 marks
Viva on experiments and Project 5 marks

Total 30 marks

PRACTICAL PERFORMED IN SARASWATI PUBLIC SCHOOL, JAGADHRI
Section A
 To find the resistance of a given wire using meter bridge and hence determine the specific resistance of its material.
 To determine the resistance per cm of a given wire by plotting a graph of potential difference versus current.
 To verify the laws of combinations ( Series/parallel) of resistances using a meter bridge.
 To determine the resistance of a galvanometer by half deflection method and to find its figure of merit.
 To compare the emf of two given primary cells using potentiometer.
Section B
 To find the focal length of a convex lens by plotting graph between u and v or between 1/u and 1/v.
 To determine the angle of minimum deviation for a given prism by plotting a graph between angle of incidence and angle of deviation.
 To draw the IV characteristic curve of a pn junction in forward and reverse bias.
 To draw the IV characteristic curve for Zener diode and to determine its reverse breaks down voltage.
 To study the characteristics of a common emitter npn or pnp transistor and to find out the value of current voltage gains
ACTIVITIES DONE IN SARASWATI PUBLIC SCHOOL, JAGADHRI
Section A
 To assemble a house hold ckt comprising three bulbs, three (on/off) switches, Thee pin schocket, a fuse and a power source.
 To assemble the components of given electrical circuit.
 To measure the resistance, voltage (AC/DC), current (AC) and check continuity of a given circuit using multimeter.
 To assemble the given resistors in suitable combinations to obtain a desired resistance and verify its value with a multimeter
 To find the current by measuring the voltage across a given resistor.
Section B
 To study the refraction and lateral deviation of ray of light passing through a glass slab.
 To study the effect of light on L.D.R.(light dependent resistor)
 To identify a diode, a LED, an transistor, an IC, a resistor and a capacitor from a mixed collection of items.
 To study the nature and size of the image formed by convex lens using a candle and screen.
 To observe the polarization of light using polaride piece
PROJECT
 Student will submit the model and theoretical report of related model.
 Beside it student will submit the collection of semiconducting devices and component and also collection of electrical components

