Electrostatics

When you charge a balloon by rubbing it on your hair this is an example of what method of charging?

• Friction
• Conduction
• Grounding
• Induction

The negatively charged balloon is brought near the two cans. What happens?

• The negative charges in Can B move towards the balloon
• The negative charges in Can A move away from the balloon
• The positive charges in Can B move towards the balloon
• The positive charges in Can A move away from the balloon

Tags

NGSS.MS-PS2-3

The cans are separated while the balloon is still near. What charge does each can have?

• Can A and Can B are neutral
• Can A is negative while Can B is positive
• Can A is positive while Can B is negative
• Both cans are positive

Tags

NGSS.HS-PS2-4

Which particle in an atom can you physically manipulate?

• protons
• electrons
• neutrons
• you can't manipulate any particle in an atom

If a negatively charged rod touches a conductor, the conductor will be charged by what method? 

• Friction
• Conduction
• Induction
• Convection

Which of these is the best definition of polarization?

• The object gains a positive or negative charge from another object.
• The charges in a neutral object separate due to a nearby charged object.
• Charges on a neutral object jump off onto a charged object due to attraction of opposite charges.
• Two objects attract each other because they are both charged.

Which of the following statements is false about electric field lines

• electric field lines cannot cross
• electric field lines point away from positive charge
• electric field lines are always straight lines
• electric field lines show how a proton would move in an electric field

Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.

• +,+
• +,-
• -,+
• -,-

Tags

NGSS.HS-PS2-4

It is observed that Balloon A is charged negatively. Balloon B exerts a repulsive effect upon balloon A. Would the electric field vector created by balloon B be directed towards B or away from B and why?

• towards because electric field lines point away from negative charges
• towards because electric field lines point away from positive charges
• away because electric field lines point away from negative charges
• away because electric field lines point toward positive charges

Tags

NGSS.HS-PS2-4

How would you draw a strong electric field?

• Draw two charges
• Draw lots of field lines, spaced close together
• Draw a few field lines, spaced far apart
• Draw straight lines coming out of a charge