Basic Electricity and Electronics - JSS1 Basic technology Past Questions and Answers - page 2

Batteries serve as portable energy storage devices, converting chemical energy into electrical energy when needed. They play a crucial role in powering small electronic devices and providing backup power in case of outages, offering mobility and autonomy to these devices.

 

The mains, also known as the electrical grid, is a network of power lines and transformers that distributes electricity from power plants to homes, businesses, and industries. It delivers alternating current (AC) electricity to buildings through outlets and sockets, reliably powering lighting, appliances, and electronics.

Generators serve as backup power sources during outages or in remote areas without access to the mains. They convert mechanical energy into electrical energy, providing temporary power to essential devices and systems until regular power supply is restored.

Voltage represents the electrical potential difference between two points in a circuit. It is the driving force that pushes electric charges (usually electrons) through a conductor, similar to the pressure in a water pipe that propels water flow. Voltage is measured in volts (V).

The unit of measurement for current is amperes (A). Current denotes the flow of electric charge through a conductor over time, quantifying the rate of electron flow in a circuit, akin to the flow rate of water in a pipe.