CHAPTER 12 | ELECTRICITY | LECTURE - 1 | (CLASS X) | CBSE | ELECTRIC CIRCUIT | ELECTRIC CURRENT | скачать в хорошем качестве

CHAPTER 12 | ELECTRICITY | LECTURE - 1 | (CLASS X) | CBSE | ELECTRIC CIRCUIT | ELECTRIC CURRENT |

CHAPTER 12 | ELECTRICITY | LECTURE - 1 | (CLASS X) | CBSE | ELECTRIC CIRCUIT | ELECTRIC CURRENT | Electric Circuit: Electric circuit is a continuous and closed path of electric current. Electric Current:: Electric current is expressed by the rate of flow of electric charges. Rate of flow means, the amount of charge flowing through a particular area in unit time. Electric current is denoted by the letter ‘I’. If a net electric charge (Q) flows through a cross-section of a conductor in time t, then, Current I = Q / t Where I is electric current, Q is a net charge and t is a time in second. S.I. Unit of Electric Charge and Current: S.I. unit of electric charge is coulomb (C). One coulomb is nearly equal to 6 × 1018 electrons. S.I. unit of electric current is ampere (A). One Ampere is the flow of electric charge through a surface at the rate of one coulomb per second. This means, if 1 coulomb of electric charge flows through a cross section for 1 second, it would be equal to 1 ampere. Therefore, 1 A = 1 C/1 s Ammeter: An apparatus to measure electric current in a circuit.,