EXPERIMENTS VIDEO FOR CLASS XII
EVALUATION SCHEME
Time Allowed: Three hours
Max. Marks: 30
| Two experiments one from each section | 7+7 Marks |
| Practical record (experiment and activities) | 5 Marks |
| One activity from any section | 3 Marks |
| Investigatory Project | 3 Marks |
| Viva on experiments, activities and project | 5 Marks |
| Total Marks | 30 |
# Record of at least 12 Experiments [with 6 from each section], to be performed by the students.
# Record of at least 6 Activities [with 3 each from section A and section B], to be performed by the students.
# The Report of the project to be carried out by the students.
SECTION A
Experiment 1 : Ohm's law to find specific resistance
Experiment 2: Meter bridge to find specific resistance
Experiment 3 : Verifying series and parallel combination using Meter Bridge
Experiment 4: Using potentimeter to find internal resistance of a given primary cell
Experiment 5: Using potentiometer to compare EMF of primary cells
Experiment 6: Using a galvanometer and find its resistance and figure of merit using half deflection method
SECTION B
Experiment 1: To find the value of v for different values of u in case of a concave mirror and to findthe focal length.
Experiment 2: To find the focal length of a convex lens by plotting graphs between u and v orbetween 1/u and 1/v.
Experiment 3 : Find focal length of concave lens using convex lens
Experiment 4: Find focal length of convex mirror using convex lens
Experiment 5:To determine angle of minimum deviation for a given prism by plotting a graph between angle of incidence and angle of deviation.
Experiment 6: To draw the I-V characteristic curve for a p-n junction diode in forward bias and reverse bias.
Experiment 7 : To draw the characteristic curve of a zener diode and to determine its reverse break down voltage.
Activities Section A class XII
| Name of Activity | links |
| 1.To measure the resistance and impedance of an inductor with or without iron core. | |
| 2.To measure resistance, voltage (AC/DC), current (AC) and check continuity of a given circuit using multimeter. | |
| 3.To assemble a household circuit comprising three bulbs, three (on/off) switches, a fuse and a power source. | |
| 4.To assemble the components of a given electrical circuit. | |
| 5. To study the variation in potential drop with length of a wire for a steady current | |
| 6.To draw the diagram of a given open circuit comprising at least a battery, resistor/rheostat, key, ammeter and voltmeter. Mark the components that are not connected in proper order and correct the circuit and also the circuit diagram. |
Activities Section B class XII
| Name of Activity | links |
| 1.To identify a diode, an LED, a resistor and a capacitor from a mixed collection of such items. | |
| 2.Use of multimeter to see the unidirectional flow of current in case of a diode and an LED and check whether a given electronic component (e.g., diode) is in working order. | |
| 3.To study effect of intensity of light (by varying distance of the source) on an LDR.. | |
| 4.To observe refraction and lateral deviation of a beam of light incident obliquely on a glass slab. | |
| 5.To observe polarization of light using two Polaroids. | |
| 6.To observe diffraction of light due to a thin slit | |
| 7.To study the nature and size of the image formed by a (i) convex lens, (ii) concave mirror, on a screen by using a candle and a screen (for different distances of the candle from the lens/mirror) | |
| 8.To obtain a lens combination with the specified focal length by using two lenses from the given set of lenses | |
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