The study of electromagnetic phenomena of a static / stationary charge is known as electrostatics.
Charges:
Property of a body by which it attract / repel another species having charges or a neutral body.
Charges are of two types:
- Positive Charge
- Negative Charge
Charges are scalar quantity; like charges repel, unlike charges attract.
Charges are quantized, that is, it is always integral multiple of a basic unit.
q=+/- ne, where n belongs to N and e = 1.609 x 10-19 C.
1 Coulomb of charge has flown through a cross section area, when 1 ampere of current has passed cross section in 1 sec.
dq =i dt
Questions:
1. Electric Current in a wire varies with time as I = 2t2+5t+10. Find the net charge flown through the wire as the function of time. If at t=0, it is known as q=0.
q = i dt
q = 2t3/3 + 5t2/2 + 10t
