📌NCERT PICKS 📌
🔴 There is a spark or crackle when we take off oursynthetic clothes or sweater in dry whether.
🔴 It is observed that if two glass rods rubbed with wool or
silk cloth are brought close to each other, they repel each
other.
🔴 On rubbing two body, the mass of one body slightly get
lowered.
🔴 An ebonite rod held in hand can be charged by rubbing
with funnel but a copper rod cannot be charged like this.
🔴 When we touch a pith ball with an electrified plastic rod,
some of the negative charges on rod are transferred.
🔴 While calculating the force between the two charges
from coulomb's law, never take into account, the sign of
two charges. It just indicates nature of the force.
🔴 The test charge used to measure electric field at point is
taken as unit in magnitude or very small.
🔴 Field lines are always directed from higher potential to lower potential. @free_notes_jee_neet
🔴 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 permitivity of the material is also known as
specific inductive capacitance.
🔴 Two charged spheres having