Science yet again Flashcards
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Describe static electricity
When a charge builds up on a objects surface due to a imbalance in charge
What is the relationship between resistance and current?
As resistance increases, current decreases.
How is charge transferred through conduction?
Contact of two objects
How is charge transferred through Friction?
When two objects are rubbed together electrons transfer
What is the relationship between voltage and current?
As voltage increases so does current.
Why are parallel circuits more commonly used in household wiring?
Parallel circuits allow independent operation of devices and maintain constant voltage across all branches.
How does the current work in a parallel circuit?
It is split between branches
How does current work In a series circuit
Each branch has its own current
How does grounding prevent damage during a lightning storm
It helps by sending the electricity across the soil
Why do you often get a static shock when touching metal after walking on carpet
Walking on the carpet causes you to accumulate a charge and when you touch the metal it causes static discharge
Why is grounding important?
It help send excess electricity away so it won’t overload and cause problems
How is charge transferred through Induction?
Nearby charged objects cause redistribution of charges in a neutral object
Describe what happens to the total resistance in a parallel circuit when additional branches are added.
Total resistance decreases as more branches are added.
What does grounding mean?
Grounding is the process of sending excess electricity to the ground with a wire
What is static discharge, and why does it occur?
When the built up charge is suddenly released. It occurs because the difference between two objects causes them to try and reach equilibrium quickly
What are the 4 components of a circuit?
Switch, Load, power source and connecting wires.
In a circuit how does the current compare at different points?
The circuits current stays the same
How does the behaviour of static charges differ from that of current electrcity?
A static charge remains on rest while current is a flow of electricity through a object
What happens to the total resistance in a series circuit when you add resisters?
The total resistance continues
What are the laws of electric charge?
- Like charges repel
- Opposite charges attract
- Neutral objects are attracted to charged objects
Why does your hair stand up when rubbed with a balloon?
The hair gives charges to the balloon making the hair positive. The now positive hair repels itself
Give an example of static discharge
Lightning strikes (or anything else)
