Positive and Negative Charges Hang from Strings

Which quantity is measured in coulombs?

• charge

• current

• electromotive force

• power

Which statement about electric charges is correct?

• Like charges attract and unlike charges attract

• Like charges attract and unlike charges repel

• Like charges repel and unlike charges attract

• Like charges repel and unlike charges repel

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

An isolated metal sphere is positively charged. It is then brought near to another isolated metal sphere that is neutral.What happens to the charges on the neutral sphere as the positively charged sphere is brought close to it?

• Some positive charges move to the

  left and some negative charges move

  to the right

• Some positive charges move to the

  right and some negative charges

  move to the left

• Some positive charges move to the

  right, but the negative charges do not move.

• The positive charges do not move, but some negative charges move to the left.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Two balloons, X and Y, are suspended by insulating threads. They are each held near a negatively charged balloon. The balloons hang as shown.What is the charge on balloon X and what is the charge on balloon Y?

• balloon X is negative and balloon Y is negative

• balloon X is negative balloon Y is positive

• balloon X is positive and balloon Y is negative

• balloon X is positive and balloon Y is positive

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Three charged balls, P, Q and R are suspended by insulating threads. Ball P is negatively charged. Ball Q is brought close to ball P.What are the charges on ball Q and on ball R?

• Ball Q is Positive and ball R is positive

• Ball Q is Positive and ball R is negative

• Ball Q is negative and ball R is positive

• Ball Q is negative and ball R is negative

Tags

NGSS.MS-PS2-3

Two similar balloons hang side by side, on insulating threads, a short distance apart. They are both rubbed with the same dry cloth and become charged. Which diagram shows how the balloons hang after charging?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Two plastic rods P and Q are both negatively charged. Rod P hangs freely.The end of rod Q is brought near to end X of rod P, and then near to end Y of rod P.What happens to the rods in each position?

• near end X they attract and near end Y they attract

• near end X they attract and near end Y they repel

• near end X they repel and near end Y they attract

• near end X they repel and near end Y they repel

Tags

NGSS.MS-PS2-3

In the diagram, rod R hangs from an insulating thread.When the positively charged rod Q is brought close to rod R, rod R moves away from rod Q. Which conclusion can be made from this observation?

• Rod R is charged, but it is not possible to identify the sign of the charge.

• Rod R must be positively charged.

• Rod R must be negatively charged.

• Rod R is uncharged.

Tags

NGSS.MS-PS2-5

Each of the four diagrams M, N, O and P shows a separate pair of insulating rods. Each rod is charged as shown.In which two arrangements do the pairs of rods experience a force of repulsion?

• M and N

• O and P

• M and P

• N and O

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A charged rod X is placed on a balance and another rod Y is brought close to it, as shown.Which combination of charges would cause the change in the balance reading shown?

• X is negative charge and Y is negative charge

• X is negative charge and Y is positive charge

• X is negative charge and Y has charge

• X is positve charge and Y has no charge

Tags

NGSS.MS-PS2-3