Practical Exams' for CBSE Class 12 Physics are scheduled to be held in the month of December 2017 and January 2018. Here, you will learn about the latest CBSE Class 12 Physics Practical Exams Syllabus, tips to score maximum marks in CBSE Class 12 Physics Practicals and other important details related to the preparation of CBSE Class 12 Physics Practical exams 2017 – 2018.
At the end of these articles, you will find important tips. These tips will help you to fetch maximum marks (or full marks) in CBSE Class 12 Physics Practical exams. If you are looking for complete CBSE Class 12 Physics Syllabus 2017 – 2018 then please go through the link given below
First we will learn about the evaluation scheme and syllabus of CBSE Class 12 Physics Practical exam 2017 – 2018
CBSE Class 12 Physics Practical Exam 2017 – 2018 (Evaluation Scheme)
Time Allowed: 3 hours
Max. Marks: 30
Two experiments one from each section
8 + 8 Marks
Practical record [experiments and activities]
Viva on experiments, activities and projects
The record to be submitted by the students at the time of their annual examination has to include:
• Record of at least 15 Experiments [with a minimum of six from each section], to be performed by the students.
• Record of at [least 5 Activities with a minimum of two each from section A & section B], to be demonstrated by the teachers.
• The Report of the project to be carried out by the students.
List of Experiments in CBSE Class 12 Physics Practical Exam’s Syllabus 2017 – 2018 -
List of Experiments: Section A
1: To determine resistance per cm of a given wire by plotting a graph for potential difference versus current.
2: To find resistance of a given wire using metre bridge and hence determine the resistivity (specific resistance) of its material.
3: To verify the laws of combination (series) of resistances using a metre bridge.
4: To verify the Laws of combination (parallel) of resistances using a metre bridge.
5: To compare the EMF of two given primary cells using potentiometer.
6: To determine the internal resistance of given primary cell using potentiometer.
7: To determine resistance of a galvanometer by half-deflection method and to find its figure of merit.
8: To convert the given galvanometer (of known resistance and figure of merit) into a voltmeter of desired range and to verify the same.
9: To convert the given galvanometer (of known resistance and figure of merit) into an ammeter of desired range and to verify the same.
10: To find the frequency of AC mains with a sonometer.
Activities - (for the purpose of demonstration only)
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 multi meter.
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.
List of Experiments: Section B
1. To find the value of v for different values of u in case of a concave mirror and to rind 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 refractive index of a liquid by using convex Lens and plane mirror.
8. To draw the I-V characteristic curve for a p-n junction in forward bias and reverse bias.
9. To draw the characteristic curve of a Zener diode and to determine its reverse break down voltage.
10. To study the characteristic of a common - emitter npn or pnp transistor and to find out the values of current and voltage gains.
Activities - (For the purpose of demonstration only)
1: To identify a diode, an LED, a transistor, an IC, a resistor and a capacitor from a mixed collection of such items.
2: Use of multimeter to (i) identify base of transistor, (ii) distinguish between npn and pnp type transistors, (iii) see the unidirectional flow of current in case of a diode and an LED, (iv) check whether a given electronic component (e.g., diode, transistor or IC) is in working order.
3: To study effect of intensity of tight (by varying distance of the source) on an LDR.
4: To observe refraction and lateral deviation of a beam of tight incident obliquely on a glass slab.
5: To observe polarization of light using two Polaroids.
6: To observe diffraction or 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.
After going through CBSE Class 12 Physics Practical’s syllabus (list of experiments) and evaluation scheme, it is clear that you can score maximum marks (or full marks) if you have successfully completed the experiments assigned to you (at the time of practical exam), you have practical record (signed by your teacher), projects etc and you have performed exceptionally well in viva.
Here are few quick tips:
• Thoroughly read the complete theory behind the experiment
• Understand Graph: Graphs, important part of Physics practical exams, students need to practice them
• Revise Practical notes (including Theory Notes)
• Imagine the diagram of the experiment & draw it roughly
• Experiments are develop to prove the Physics principle. Therefore, remember the basic principles behind performing the particular experiment.
• Methodology and Principle are the frequently asked questions during viva.
• Don’t be nervous at the time of experiment & write the important steps before starting the practical (you can also draw a flowchart)
• In case of any doubt, consult with the teacher or lab attendant.