Invisible Fields
Called the 'universal force,' this type of invisible field exists between all masses.
What is gravity?
When you rub a balloon on your hair and it sticks to the wall, this is because electrons have been transferred and created this type of charge.
What is static electricity?
Like charges do this, while opposite charges do that.
What is repel and attract?
The opposition to the flow of electric charge.
What is Resistance?
This type of field surrounds an electrically charged object.
What is an electric field?
This term describes the process by which electrons are transferred from one object to another by direct contact.
What is conduction?
When two objects have different charges, one being positive and the other negative, they will exert this type of force on each other.
What is an attractive force?
Low resistances, and electric current travels through them easily.
What is conductors?
These lines represent the strength and direction of an invisible field and never cross each other.
What are electric field lines?
A balloon has equal numbers of charged particles.
What is a neutrally charged balloon?
Electric forces are attractive.
What is opposite charges?
Materials that act as a conductor under certain circumstances, and insulator under other circumstances.
What is semiconductors?
These charged particles cause the electric field lines to point away.
Two things that the strength of electric forces depend on.
An electric current flows through it
What is a conductor?
A working model of a design solution that can be used for testing and refining the design.
What is prototype?
Explain the "stinky analogy" discussed in class, and how it can help you understand forces caused by electric fields.
The scent of the poo surrounds the diaper and the scent is stronger the closer you are to the diaper. Just as the stinky diaper can be detected by the scent that surrounds it, a charged object can be detected by something that surrounds it.
At the school dance, you rub a balloon on your date's head and then you stick the balloon on the gym wall. Explain this phenomena in turns of electric charge and forces.
Your date's hair is a neutral charge before you rubbed the balloon. The action caused the balloon to pickup electrons from their hair. The negatively charge balloon pushes the negatively charged particles in the wall away and attracts the positively charged particles causing the balloon to stick to the wall.
Computer chips are an example of these.
What is semiconductors?
A property of matter that causes electrical phenomena.
What is electric charge?