Electricity: Circuits and their Components

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An electric cell is a portable source of electrical energy. It has two terminals: positive (+ve) terminal (metal cap) and negative (-ve) terminal (flat metal disc). The positive terminal is marked wit

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A battery is a combination of two or more electric cells connected together. The cells are connected such that the positive terminal of one cell is connected to the negative terminal of the next cell.

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The filament is a thin wire inside the glass bulb of an incandescent lamp. When electric current passes through the filament, it gets hot and glows to produce light. The filament is attached to two th

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LED (Light Emitting Diode) differs from incandescent lamps in several ways: 1) LEDs have no filament, 2) LEDs have polarity - positive terminal (longer wire) and negative terminal (shorter wire), 3) C

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An electrical circuit is a complete path that allows electric current to flow from the positive terminal to the negative terminal of an electric cell. A lamp glows only when the circuit is complete an

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Electric current in an electrical circuit flows from the positive terminal to the negative terminal of the electric cell. This is the conventional direction of current flow that is followed in circuit

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For an LED to glow, it must be connected correctly: the positive terminal (longer wire) of the LED should be connected to the positive terminal of the battery, and the negative terminal (shorter wire)

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An electric switch is a device that either completes or breaks an electrical circuit. In the ON position, the switch closes the gap and completes the circuit, allowing current to flow and the lamp to