Electrostatics Review

A neutral object becomes __charged if electrons are removed.

Two conducting spheres A and B, are placed on insulating stands as shown. A negatively charged balloon is brought near A. With the balloon still nearby, the two spheres are separated by moving the insulating stands. What is the resulting charge on A and B?

• A: Positive

  B: Positive

• A: Negative

  B: Positive

• A: Negative

  B: Negative

• A: Positive

  B: Negative

Reorder the following to show the progression of steps in Charging by Induction.

• 
• 
• 
• 
• 

The diagram on the right is an example of ​ (a)  

• polarization
• induction
• charging
• charging by friction
• protons moving from rod to sphere
• electrons moving from sphere to rod
• charging by contact

A solid conducting sphere is given a positive charge Q. How is the charge Q distributed in or on the sphere?

• It is concentrated at the center of the sphere.

• It is uniformly distributed throughout the sphere.

• Its density decreases radially outward from the center.

• Its density increases radially outward from the center.

• It is uniformly distributed on the surface of the sphere only

Choose the correct sign of the charge on Can I and Can J?

Can I (a)  

Can J​ (b)  

• Negative
• Positive
• Neutral

A negatively charged balloon will be attracted to a neutral wooden cabinet due to polarization. Which one of the following diagrams best depicts why this occurs? __

Choose the direction of electron flow in the diagram shown?

​ ​ (a)  

• Hand to sphere
• Balloon to sphere
• sphere to hand
• balloon to hand
• Sphere to balloon

The electrostatic interaction between three objects is as shown. Which of the following is a possible combination of the correct charges on each? Choose all answers.

• A: Positive

  B: Positive

  C: Positive

• A: Neutral

  B: Positive

  C: Positive

• A: Negative

  B: Positive

  C: Negative

• A: Positive

  B: Neutral

  C: Positive

• A: Neutral

  B: Negative

  C: Negative

Which of the following is constant for an object

in uniform circular motion?

• Kinetic energy

• Velocity

• Acceleration

• Displacement

• Linear momentum