Electrostatic Topic 6 Matter and Energy II

What was the stone that the ancient Greeks used to rub to attract other objects; and it was called elektron?

• fossilized carbon

• resin

• amber

• packaged mosquitoes for Jurasic Park

Benjamin Franklin named the positive and negative charges, giving the base for a law that states:

• Equal charges have repulsive forces, while different charges are pulling each other.

• I won't touch anything that could give me an electrical shock.

• Charges with equal symbols have repulsive forces, while charges with different symbol are pulling each other.

• There are repulsive and pulling forces according to the charges.

Who stated the Coulomb's law to describe how the charges interact?

• Isaac Newton

• Thales de Miletus

• Benjamin Franklin

• Charles A. Coulomb

What type of electrostatic charge is described on the image?

• Conduction

• Induction

• Friction

What type of electrostatic charge is given when you brush your hair?

• Conduction

• Induction

• Friction

What type of electrostatic charge is described on the image? The objects does not have contact.

• Conduction

• Induction

• Friction

What type of electrostatic charge is described on the image? The objects have contact.

• Conduction

• Induction

• Friction

The Faraday's cage is the base of the aplications of electrostatic charges. The things inside of this metal cage are saved from any electrical discharge. Which of the next examples are based on Faraday's cage.

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• 
• 
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Which of the next materials are semiconductor?

• Silver metal

• PVC

• Silicon

• germanium

How many times the force is affected if the distance between two charges decreases FIVE times; according Coulomb's law.

• The force of love is stronger than the distance, we can be happy XD

• Force increases five times

• Force increases ten times

• Force increases twenty-five times