CBSE Class 12th Physics Notes - Electric Field | NCERT Solutions 12th

1. CBSE Class 12th Physics Notes – Electric Field Start your CBSE Physics exam preparation with us…! Our package includes: 1. Online Study Material 12th Physics 2. Previous year Question Papers of CBSE 12th Physics 3. CBSE NCERT Solutions Class 12 4. CBSE Sample Papers 12th Physics Physics notes for class 12 Electric Field: The region in which a charge experiences a force is called an electric field. Electric Field Strength: Electric field strength at a point is vector quantity and is defined as the force experienced by unit positive charge placed at that point and whose direction is along direction of force. The electric field strength due to a point charge q at a distance r is E = q/4Π£0 r2 The unit ofElectric field strength is Newton/Coulomb. Electric Field Lines:The path along which a unit positive charge would move if it is free to do so. Properties of Electric Field Lines:  Electric field lines start at positive charge and end at negative charge. For an isolated single charge electric field lines start or end at infinity.  Two electric field lines never intersect each other.  In a charge free region electric field lines have no break or they are continuous.  In a uniform electric field, electric field lines are parallel.

2.  The number density of electric field lines at a point gives the strength (intensity) of The number density of electric field lines at a point gives the strength (intensity) of electric field at that point.  Electric field lines do not form closed loops. Electric field lines do not form closed loops.  The tangent drawn to the electric field line at a point gives the direction of the elec The tangent drawn to the electric field line at a point gives the direction of the electric field at that point. tric field at that point. For animated videos of Electrostatics & more, click at For animated videos of Electrostatics & more, click at Online CBSE Exam Preparation Electric field lines due t Electric field lines due to an isolated positive charge Electric field lines due to an isolated negative charge Electric field lines due to an isolated negative charge Electric field lines due to pair of equa Electric field lines due to pair of equal and opposite charges

3. Electric field lines due to two positive Electric field lines due to two positive charges Question: Two electric field lines never intersect. Why? intersect. Why? Ans: If two electric field lines intersect at a point, then there will be two directions for electric field at that point. But thi is not possible. So, two electric field lines never intersect each other. is not possible. So, two electric field lines never intersect each other. If two electric field lines intersect at a point, then there will be two directions for electric field at that point. But thi If two electric field lines intersect at a point, then there will be two directions for electric field at that point. But this For more information related NCERT solutions of Class11and 12 Biology notes,kindly visit www.takshilalearning.com kindly visit www.takshilalearning.com For more information related to CBSE Board exams, online courses, NCERT solutions of Class11and 12,Sample papers, Physics, Chemistry, and Sample papers, Physics, Chemistry, and to CBSE Board exams, online courses, CBSE