JEE Main Experimental Skills Revision Notes
JEE Main Experimental Skills Revision Notes  PDF Download
JEE Main Physics Syllabus has two sections, SectionA & B.
SectionA comprises theory with 80% weightage and SectionB comprises practical components (Experimental Skills) with 20% weightage.
To score fullmarks in SectionB, you need to develop experimental physics skills. If you want to develop experimentation skills under the guidance of our faculties, you can join the Vedantu studying program.
For your convenience, our subject experts have prepared the JEE Main Physics Experimental Skills notes.
Please go through the experimental skills notes, prepared by our topranked IIT faculties
JEE Main Experimental Skills Notes
Engineering aspirants must be familiar with the observation and experiments of the following topics:
S.No.  Topic 
1.  Vernier Caliper 
2.  Screw Gauge 
3.  Simple Pendulum 
4.  Young’s modulus of Elasticity 
5.  Surface Tension 
6.  Coefficient of Viscosity, Terminal Velocity 
7.  The relationship between the temperature of a body and time 
8.  Speed of sound in air at room temperature 
9.  Specific heat capacity of solid and liquid 
10.  The resistivity of a material 
11.  The resistance of wire using Ohm’s law 
12.  Potentiometer

13.  To determine the resistance of a galvanometer by using half deflection method 
14.  The focal length of Concave mirror, Convex mirror, and Convex Lens by the Parallax method 
15.  The graph between angle of deviation and angle of incidence of a triangular prism 
16.  Determine the refractive index (μ)of a glass slab using a microscope 
17.  Characteristics of a pn junction diode 
18.  Characteristics curves of Zener diode 
19.  Characteristics curve of a transistor 
20.  Identify the following components: Diode, LED, Transistor, IC, Resistor, Capacitor from a mixed collection of such items. 
21.  Use of Multimeter 
Our faculties have prepared the experimental skills revision notes for these topics. Please go through it:
Experimental Skills JEE Main Revision Notes
Vernier Scale to Determine the Least Count and Zero Error
Least count (L.C.) is the magnitude of the smallest measurement that can be measured by a vernier caliper accurately. Its formula is given by
L.C. = One Main scale division  One Vernier scale division
When no object is in between the jaws of vernier; it should give a zero Reading.
Because of extra material on its jaws, even if no object is in between them, vernier shows excess reading. This excess reading is called the zero error.
Determine the Diameter/thickness of Wire Using Screw Gauge
If the wire between the plane faces A and B, the edge of the cap lies ahead of the Nth division of linear scale, then the linear scale reading (L.S.R.) is N.
Now, if the nth division of a circular scale lies over the reference line, the circular scale reading (C.S.R) = n x L.C. of screw gauge.
Now, total reading = L.S.R + C.S.R = N + n * (L.C.)
The pitch of screw gauge = (Distance traveled by screw/Number of rotations), and
L.C. = (Pitch/No of divisions on a circular scale)
Here, the pitch is the linear distance moved on the main scale in one rotation.
For Studying the Conservation Energy at Different Intermediate Positions of an Oscillating Simple Pendulum
Here, h = d2/2l
KE = ½ mv2 , and
PE = mgh = (1/2l) mg d2
So, Total energy = ½ mv2 + (1/2l) mg d2
Determine the Mass by the Principle of Moments of Mass Using a Meter Scale
If m = mass of the body
M = mass of the weight
a1, a2 = distance of their loops from the wedge, then by principle of moments of mass
Mga1 = mga2 m = (Ma1/a2)
Determining Young’s Modulus of Elasticity of the Wire
If a wire of length L and radius ‘r’ is loaded by a weight mg, then the elongation in the wire is △L. Then,
Normal stress = F/A = (mg/𝜋r2), Longitudinal strain = △L/L
Young’s Modulus of elasticity = (mgL/𝜋r2△L)
For more revision notes on the further topics, click on the link below to download the experimental skills notes pdf
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1. Write Ways to Do Experiments.
Following are the ways of performing experiments:
Make observations
Form a hypothesis and make a prediction
Perform experiments and then analyze their results
Conclude and record your results
2. How to Score Well in the Experimental Skills Section?
Our faculties suggest the following tips:
Understand all the basic concepts from NCERT.
Practice a lot and remember all apparatuses and the procedure to perform well in experiments.
3. How Can I Get AIR 1 in JEE?
Our IIT faculties suggest the following tips to get AIR 1 in JEE:
Work hard without any stress.
Follow the study plan and stick to it.
Focus on basic concepts.
Practice time management by solving chapterwise model papers daily.
Solve Previous Year Question Paper to understand the type of question asked in the past years and
Determine your weak areas by solving sample papers.
Make a habit of revising the topics.
Be confident during your JEE Main exam. This is how you can achieve AIR 1 in JEE.
4. When is the JEE Main 2021 Exam?
JEE Main exam will be held in January 2021 in CBT mode, and the application for the second session will be available in February 2021.