Basic Electricity and Electronics - JSS1 Basic technology Past Questions and Answers - page 2
Which component distributes electricity from power plants to homes and businesses?
Solar panels
Generators
Mains
Batteries
What is the role of generators?
Store electrical energy
Converts mechanical energy to electrical energy
Converts sunlight into electrical energy
Regulates voltage in electrical circuit
What does current measure in an electrical circuit?
Voltage
Resistance
The flow of electric charge
The opposition to electric current flow
Which unit is used to measure resistance?
Volts (V)
Amperes (A)
Ohms (Ω)
Watts. (W)
What is the electrical potential difference between two points in a circuit called?
Current
Resistance
Voltage
Conductivity
What is the function of batteries in providing electricity?
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.
What are the mains also known as?
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.
Which component serves as a backup power source during outages?
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.
What does voltage represent in an electrical circuit?
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).
What is the unit of measurement for current?
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.