TABLE OF CONTENTS

TOPIC 1: ELECTRIC CURRENT

Electric current (I) is the amount of charge passing through any point in a conductor per unit time. The SI unit of current is ampere (A), named after French scientist and mathematician Andre Marie Ampere.

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TOPIC 2: RESISTANCE AND VOLTAGE

Resistance is the opposition of a material to the flow of charges through it. The SI unit of resistance is the ohm (Ω), named after Georg Simon Ohm. Voltage, also called electromotive force, is a quantitative expression of the potential difference in charge between two points in an electrical field.

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TOPIC 3: OHM'S LAW

Ohm’s Law states that the electric current I through a part of a circuit is directly proportional to the potential difference V across that part of the circuit.

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TOPIC 4: ELECTRIC POWER AND ENERGY

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