International General Certificate of Secondary Education (IGCSE) Chemistry Practice Exam

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What is meant by electric current?

  1. The speed of electrons in a conductor

  2. The rate of flow of charged particles

  3. The energy carried by electrical devices

  4. The voltage in a circuit

The correct answer is: The rate of flow of charged particles

Electric current refers to the rate of flow of charged particles through a conductor. This is typically measured in amperes (A), and it signifies how many coulombs of charge pass through a particular point in the circuit per second. In most practical applications, the charged particles involved are electrons, which move through conductive materials such as metals. Understanding electric current in this way highlights its fundamental role in electrical circuits, where the flow of these charged particles enables the functionality of electrical devices. This is crucial for anyone studying IGCSE Chemistry, as it lays the groundwork for topics related to electricity, electrolysis, and the behavior of substances in an electric field.

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