P P1 - Electricity Flashcards
What happens at a step-up transformer?
At a step-up transformer, the voltage increases and the current decreases. It increases efficiency and reduces heat loss.
What happens at a step-down transformer?
At a step-down transformer, the voltage decreases and the current increases. It makes it safer for houses.
What happens when two insulating materials rub together?
When two insulation materials are rubbed together, electrons move from one material to another.
For static electricity, electrical charge is s________
For static electricity, electrical charge is stationery
How does a shock happen from walking on carpet?
When walking on carpet, friction happens. Electrons move to the person and the charge builds up. When the person touches a metal object, the electrons conduct away making a spark.
What is the brown wire called in a plug?
The brown wire in a plug is called the live wire
What is the blue wire called in a plug?
The blue wire in a plug is called the neutral wire
What is the green/yellow striped wire called in a plug?
The green and yellow striped wire in a plug is called the earth wire
What is the role of the live wire?
The live wire carries the electrical current
What is the role of the neutral wire?
The neutral wire completes the circuit
What is the role of the earth wire?
The earth wire is for safety by carrying the current if there is a fault
What happens at an alternating current?
At an alternating current, the current switches directions
What happens at a direct current?
At a direct current, the current flows in the same direction
What happens to the current when the resistance is increased?
When resistance is increased, the current is reduced
What happens to the current when the resistance is decreased?
When the resistance is decreased, the current is increased
