General Introduction of Practical Work
Section - A
EXPERIMENTS
1. To determine resistivity of two/three wires by plotting a graph for potential difference versus current.
2. To find the resistance of a given wire/standard resistor using a metre bridge.
3 (i). To verify the law of combination (series) of resistances using a metre bridge.
3 (ii). To verify the law of combination (parallel) of resistances using a metre bridge.
4. To determine the resistance of a galvanometer by the half-deflection method and to find its figure of merit.
5 (i). To convert the given galvanometer (of known resistance and figure of merit) into a voltmeter of desired range and to verify the same.
5 (ii). To convert the given galvanometer (of known resistance and figure of merit) into an ammeter of desired range and to verify the same.
6. To find the frequency of the A.C. mains with a sonometer.
ACTIVITIES
1. To measure the resistance and impedance of an inductor with or without an iron core.
2. To measure resistance, voltage (A.C./D.C.) and current (A.C.) and check continuity of a given circuit using a 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.
Section B
EXPERIMENTS
1. To find the value of v for different values of u in case of a concave mirror and to find the focal length.
2. To find the focal length of a convex mirror using a convex lens.
3. To find the focal length of a convex lens by plotting graphs between u and v or between 1/u and 1/v.
4. To find the focal length of a concave lens using a convex lens.
5. 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.
6. To determine the refractive index of a glass slab using a travelling microscope.
7. To find the refractive index of a liquid by using a convex lens and a plane mirror.
8. To find the refractive index of a liquid by using a concave mirror and a plane mirror.
9. To draw the I-V characteristic curve of a p-n junction diode in forward bias and reverse bias.
ACTIVITIES
1. To identify a diode, an LED, a transistor, a resistor and a capacitor from a mixed collection of such items.
2. Use a multimeter to see the unidirectional flow of current in the case of a diode and an LED and check whether a given electronic component (e.g., a diode) is in working order.
3. To study the 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 diffraction of light due to a thin slit.
6 (i). 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.)
6 (ii). 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 mirror.)
7. To obtain a lens combination with the specified focal length by using two lenses from the given set of lenses.
