Hi CUET aspirants, Welcome to Amans Maths Blogs (AMBIPi). In this post, you will get CUET Physics Electric Charges and Fields Revision Notes PDF. This CUET Physics Notes are designed by analyzing to the CUET Syllabus and CUET Previous Years Questions Papers.
CUET Physics Notes
CUET Physics Electric Charges and Fields: Important Points to Remember
There are following important points in this chapter of Electric Charges and Fields.
- Field lines are always directed from higher potential to lower potential.
- Neutral point is a point where resultant electric field is zero.
- When a charged particle enters with velocity at right angle to the uniform field the trajectory is parabola.
- A surface having same electric potential at every point is an equipotential surface.
- Work done in moving a charge along an equipotential surface is always zero.
- Relative permittivity of the material is also known as specific inductive capacitance.
- Two charged spheres having radii r1 and r2 charge densities σ1 and σ2 respectively then ratio of electric field is given by.
- In air if intensity of electric field exceeds the value 3 × 106 N/C, air ionizes.
- Force characteristic of field is intensity and work characteristic of field is potential.
- Electric fields due to point charge E ∝ 1/ r2.
- Electric fields due to dipole charge E ∝ 1/ r3.
- For metals, in electrostatics K = ∞ and induced charge is opposite to the inducing charge.
- Coulomb’s law is valid at a distance greater than 10-15 m (1 fermi).
- Decreasing order of fundamental forces is FNuclear > FElectromagnetic > FWeak > FGravitational.
- At the center of the line joining two equal & similar charge V ≠ 0, E = 0.
- Charges can be created only in equal and unlike pairs.
- Coulomb’s law of electric force obey Newton’s third law of motion.
- Electric potential is a property of an electric field whether a charged particle is placed in that field or not.
- Electric Field Lines are as below.
- Electric lines of electrostatic field are Imaginary lines.
- Electric lines of electrostatic field never intersect.
- Electrostatic field lines never forms closed loops.
- Field lines ends or starts normally at the surface of a conductor.
- If there is no electric field there will be no field lines.
- Number of electric field lines per unit area normal to the area at a point represents magnitude of intensity, crowded
lines represent strong field while distant lines weak field. - Tangent to the line of force at a point in an electric field gives the direction of intensity of electric field.
CUET Physics Electric Charges and Fields: Important Graphs
1. Point Charge E = kq/ r2.
2. Charged conducting sphere
3. Uniformly charged non conducting sphere:
4. Linear charge distribution of length “l”
5. For infinite line of charge 
6. Infinite charged conducting plate
7. Infinite sheet of charge (or charged non conducting plate)
8. Charge circular ring at an axial point
9. Point charge V = kq / r
10. Charge conducting sphere
11. Uniformly charged non conducting sphere
12. Segment of ring
13. Electric Potential at a Distant Point Along The Axis of a Charged Ring
CUET Physics Electric Charges and Fields: Important Formulas
1. Coulomb’s Law, Electric Field Due to Point Charges
2. Electric Field Due to Uniform Bodies, Field Lines, Motion of Charge
3. Electric Flux
4. Gauss Law
5. Electric Potential, Potential Energy, Self Energy, Relation Between E & V
6. Relation between E & V
7. Dipole
CUET Physics Mock Test
Now, you have revised the this CUET Physics chapter. So, you must need to practice CUET Physics Sample Papers. By solving these CUET Physics questions, you will be more confident about your CUET preparations.
