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😮OMG! Removing Parallax! Physics Experiment Find the focal length of convex mirror and lens #shorts #physics
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Physics Practical File 2022-23 Class 12 CBSE BOARD | Practical File for Boards Class 12 | Rishabh Daksh
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1. To determine resistivity of two / three wires by plotting a graph for potential
difference versus current.
2. To find resistance of a given wire / standard resistor using metre bridge.
3. To verify the laws of combination (series) of resistances using a metre bridge.
OR
To verify the laws of combination (parallel) of resistances using a metre bridge.
4. To determine resistance of a galvanometer by half-deflection method and to find its
figure of merit.
5. To convert the given galvanometer (of known resistance and figure of merit) into a
voltmeter of desired range and to verify the same.
OR
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 AC mains with a sonometer.
Activities
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.

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 angle of minimum deviation for a given prism by plotting a graph
between angle of incidence and angle of deviation.
6. To determine refractive index of a glass slab using a travelling microscope.
7. To find the refractive index of a liquid using convex lens and plane mirror.
8. To find the refractive index of a liquid using a concave mirror and a plane mirror.
9. To draw the I-V characteristic curve for a p-n junction diode in forward and reverse
bias.
Activities
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 diffraction of light due to a thin slit.
6. To study the nature and size of the image formed by a (i) convex lens, or (ii) concave
mirror, on a screen by using a candle and a screen (for different distances of the
candle from the lens/mirror).
7. To obtain a lens combination with the specified focal length by using two lenses
from the given set of lenses.
Physics Practical File 2022-23 Class 12 CBSE BOARD Practical File for Boards Class 12 by Rishabh Daksh
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