User:Kondraguntajb/sandbox

UNIT – I BASIC CIRCUIT ANALYSIS Ohm’s Law – Kirchhoff’s laws – DC and AC Circuits – Resistors in series and parallel circuits – Mesh current and node voltage method of analysis for D.C and A.C. circuits – Phasor Diagram –Power, Power Factor and Energy. Charge: The charge of an electron is so small. Charge in motion represents a current. Charge can be continuously transferred between different parts of a circuit. Charge is an electrical property of the atomic particles which matter consists. The unit of charge is the coulomb (C). The symbol for the charge is Q (or) q. 1 coluomb of total charge is =6.24 × 〖10〗^18 electrons Current: It is defined as the rate of flow of electrons in a conductive or semi conductive medium Current I=dq/dt  (or)I= Q/t Where		I  average current flowing Q  total charge transferred t  time required for transfer of charge 1 ampere  1 Coulomb / second If the magnitude of current is constant with respect to time, it is called direct (DC) current. An alternating current (AC) is a current that varies sinusoidally with respect to time.