ROLL NUMBERS 4605691 TO 4605715-25 STUDENTS-0900 HRS TO 1200 HRS
Evaluation Scheme for Practical Examination
v One experiment from any one section : 8 Marks.
v Two activities(one from each section)(4+4) : 8 Marks.
v Practical record (experiments and activites) : 6 Marks.
v Record of demonstarion experiments and viva
based on these experiments : 3 Marks.
v Viva on experiments and activites : 5 Marks.
v Total : 30 Marks
SECTION-A
Experiments
AP1.To determine the resistance per cm of a given wire by plotting a graph of potential difference versus current.
AP2.To find the resistance of a given wire using metre bridge and hence determine the specific resistance of its material.
AP3.To verify the laws of combination(series and parallel) of resitances using metre bridge.
AP4.To Compare the E M F’s of two given primary cells using a potentiometer.
AP5.To determine the internal resistance of a given primary cell using a potentiometer
AP6.To determine the resistance of a galvanometer by half deflection method to find its figure of merit and to convert it into an ammeter of desired range.To verify the same.
AP7.To determine the resistance of a galvanometer by half deflection method to find its figure of merit and to convert it into a voltmeter of desired range.To verify the same.
AP8.To find the frequency of the AC mains with a sonometer(and an electromagnet)
Activities
AA1.To assemble a household circuit,comprising three bulbs,three (on/off) switches,a fuse and a power source.
AA2.To measure resistance,voltage (AC/DC), current(AC) and check continutity of a given circuit using multimeter.
AA3.To assemble the components of a given electrical circuit(say Ohm’s law circuit)
AA4.To study the variation in potential drop with length of a wire for a steady current.
AA5.To draw the diagram of a given open circuit comprising of least a battery, resistance, rheostat, key, ammeter and voltmeter.Mark the components that are not connected in proper order and correct the circuit and also the circuit diagram.
SECTION-B
Experiments
BP1.To find the value of v for different values of u in case of a concave mirror and to find the focal length( by plotting graph:i) between u and v; ii)between 1/u and 1/v)
BP2.To find the focal length of a convex lens by plotting graphs between u and v or between 1/u and 1/v.
BP3.To determine the angle of minimum deviation for a given prism by plotting a graph between the angle of incidence and the angle of deviation.And to determine the refractive index of a material(glass) of the prism.
BP4.To draw the I-V characteristic curve of a p-n junction in forward bias and reverse bias.
BP5.To draw the characteristics curve of a Zener diode and to determine its reverse breakdown voltage.
BP6.To study the characteristics of a common emitter N-P-N ( or P-N-P) transistor and to find the values of current and voltage gains
Activities
BA1.To study the effect of light(by varying distance of the source) on an LDR(Light Dependent Resistor)
BA2.To identify a diode,an LED,a transistor,an IC,a resistor and a capacitor from a mixed collection of such items.
BA3.To observe refraction and lateral deviation (displacement) of a beam of light incident obliquely on a glass slab.
BA4.To study the nature and size of the image formed by a concave mirror on a screen by using a candle and a screen for different distances of the candle from the lens.
BA5.To study the nature and size of the image formed by a convex lens on a screen by using a candle and a screen for different distances of the candle from the lens.
