BASIC CONCEPTS OF D.C.CIRCUITS ➢ ELECTRIC CHARGE • Amount of current flowing in a conductor is measured in electric charge. • Two different kinds of charge, positive and negative. • It’s denoted by Q or q. • Electric charge is measured in Columb (c). ➢ VOLTAGE • We defined voltage as the amount of potential energy between two points on a circuit. • One point has more charge than another. • This difference in charge between the two points is called voltage. • It is measured in volts. ➢ ELECTRIC CURRENT • The controlled movement of electrons through a substances is called the electric current. • It is also defined as the time rate of net motion of an electric charge across sectional boundary. I = 𝑄/t • Coulomb is the SI unit for measurement of electric charge. (1 coulomb ≈ 624×1016) and time is measure in second. • Electric current measure in Ampere. ➢ EMF AND POTENTIAL DIFFERENCE • Electromotive force (emf) i...