# CBSE Lab Manual Physics for Class 12

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Sahitya Bhawan class 12 Physics Lab Manual with theory, Viva-voce Questions and Laboratory instruction based on NCERT and CBSE syllabus 1843
• Sahitya Bhawan Lab Manual with theory, Viva-voce Questions and Laboratory instruction for class 9, 10, 11, 12 has been prepared in accordance with the NCERT, CBSE, UP Board and other state boards syllabus.
• Practical book provides a better understanding of various concepts in a lucid manner.
• The entire matter is prepared in a way that it provides complete understanding of each topic.
• Viva-voice questions and answers helps the students in having a better understanding of concepts.
• Viva Voce questions are followed with answers.
• After theory matter, blank pages are provided for writing experiments.
• Lab Manual series contains Science, Mathematics, Social Science, Physics, Chemistry, Biology, Physical Education

Contents

• General introduction : science and physics

Section : AExperiment No. 1

• To determine resistance per cm of a given wire by plotting a graph of potential difference versus current.
• Experiment No. 2
To find the resistance of a given wire using Meter bridge and hence determine the specific resistance of its material.
• Experiment No. 3
To verify the law of combination (series) of resistances using a Meter bridge.
• Experiment No. 4
To verify the law of combination (parallel) resistances using a Metre bridge.
• Experiment No. 5
To compare the emfs of two given primary cells using potentio meter.
• Experiment No. 6
To determine the internal resistance of a given primary cell using potentio meter.
• Experiment No. 7
To determine the resistance of a galvanometer by half deflection method and to find its figure of merit.
• Experiment No. 8
To convert a given galvanometer (of known resistance and figure of merit) into a voltmeter of desired range and to verify the same.
• Experiment No. 9
To convert the given galvanometer (of known resistance and figure of merit) into an ammeter of desired range and to verify the same.
• Experiment No. 10
To find the frequency of the a.c. mains with a Sono meter
• Activity no. 1
To measure the resistance and impedance of an inductor with or without iron Core.
• Activity No. 2
To measure resistance, voltage (ac / dc) current (ac) and check continuity of a given circuit using multi-multi meter.
• Activity No. 3
To assemble a household circuit comprising three bulbs, three (on/off) switches, a fuse and a power source.
• Activity No. 4
To assemble the components of a given electrical circuit.
• Activity No. 5
To study the variation in potential drop with length of a wire for a steady current.
• Activity No. 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.

Experiment : B

• Experiment : No. 1
To find the value of v for different value of u in case of a concave mirror and to find the focal length.
• Experiment No. 2
To find the focal length of a convex mirror, using a convex lens.
• Experiment No. 3
To find the focal length of a convex lens by plotting graphs between u and v or between 1/u and 1/v.
• Experiment No. 4
To find the focal length of a concave lens, using convex lens.
• Experiment No. 5
To determine the angle of minimum deviation for a given prism by plotting a graph between the angle of incidence and angle of deviation.
• Experiment No. 6
To determine the refractive index of a glass slab using a travelling microscope.
• Experiment No. 7
To find the refractive index of a liquid by using convex lens and plane mirror.
• Experiment No. 8
To study the characterstic curve of a p-n junction diode in forward bias and reverse bias.
• Experiment No. 9
To draw the characterstic curves of a zener diode and to determine its reverse breaks down voltage.
• Experiment No. 10
To determine the wavelength of a laser beam by diffraction.
• Activity no. 1
To identify a diode, an LED, a transistor, an IC, a resistor and a capacitor from a mixed collection of such items.
• Activity No. 2
Use of multi meter to :
(a) Identify base of transistor
(b) distinguish between n-p-n and p-n-p type transistors.
(c) see the unidirectional flow of current in case of a diode and an LED.
(d) check whether a given electronic component (eg. diode, transistor or IC) is in working order)
• Activity No. 3
To study the effect of intensity of light (by varying distance of the source) on an LDR. 7
• Activity No. 4
To observe refraction and lateral deviation of a beam of light incident obliquely on a glass slab.
• Activity No. 5
To observe polarisation of light using two polaroids.
• Activity No. 6
To observe diffraction of light due to a thin slit.
• Activity No. 7 (A)
To study the nature and size of the image formed by a convex lens on a screen by using a candleand a screen (for different distances of the candle from the lens.).
• Activity No. 7 (B)
To study the nature and size of the image for-med by a concave mirror on a screen by usinga candle and a screen (for different distances of the candle from the lens.).
• Activity No. 8
To obtain a lens combination with the specified focal length by using two lenses from the given set of lenses.

Investigatory Projects

• project 1
• To study the various factors on which the internal resistance/EMF of a cell depends.
• project 2
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 .
• project 3
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.
• project 4
To design an appropriate logic gate combination for a given truth table.
• project 5
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..
• project 6
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.
• project 7
To estimate the charge induced on each one of the two identical styro foam (or pith) balls suspendend in a vertical plane by making use of Coulombs law.
• project 8
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 an A.C. source of adjustable frequency.
• project 9
To study the earths magnetic field using atangent galvanomet
 Edition 2021 Class 12 Subject Physics Board CBSE Author Divya Agrawal Binding Hard bound Pages 304 Language English Country India Series Title Sahitya Bhawan | Pratiyotia Sahitya Isbn 99789387666641
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