Physics - Electricity (Static and Current)

A neutral electroscope is touched with a negatively charged rod. What is the charge on the electroscope after the rod is removed?

• positive

• negative

• it stays neutral

• it depends on the contact time

A neutral electroscope is touched with a positively charged rod. After the rod is removed the charge on the electroscope is _______ because of _________

• negative; conduction

• positive; conduction

• negative; induction

• positive; induction

A plastic rod is rubbed with a piece of rabbit fur. The plastic rod acquires a negative charge during this process. Which is true about the charge of the piece of fur?

• It acquires a positive charge but greater in magnitude than the rod

• It acquires a negative charge but greater in magnitude than the rod

• It acquires a negative charge but less in magnitude than the rod

• It acquires a positive charge with the same magnitude as the rod

A positively charged rod is brought close to one end of a neutral metallic plate. What type of charge is induced on the closest side of the plate?

• positive

• negative

• neutral

• it depends on the separation distance between the rod and plate

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A neutral plastic strip is rubbed with cotton and acquires a positive charge. Which of the following statements are true of the positively-charged strip?

• It lost some electrons to the cotton during the charging process.

• It lost all of its electrons to the cotton during the charging process

• It has gained protons from the cotton during the charging process.

• As a material, plastic has a greater electron affinity for electrons than cotton.

The diagram shown below illustrates charging a sphere by conduction. What will be the charge of the sphere?

• positive; it has gained protons

• positive; it has lost electrons

• negative; it has gained electrons

• negative; it has lost protons

Tags

NGSS.HS-PS2-4

Which of the following statements are true about electric force?

• Electric force is a contact force

• Electric force between two charged objects increases with increasing separation distance.

• Electric forces between two charged objects increases with increasing quantity of charge on the objects.

• Electric forces only act between charged objects that are like-charged or oppositely-charged

Tags

NGSS.HS-PS2-4

Which of the following statements are NOT true statements about electric fields?

• The electric field strength greater by object A is dependent upon the separation distance from object A.

• The electric field strength created by object A is dependent upon the charge of object A.

• The electric field strength created by object A is dependent upon the charge of the test object used to measure the strength of the field.

• Electric fields are directed inwards in regions around negatively-charged objects and outwards in regions around positively-charged objects

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is the charge of Can L?

• positive

• negative

• neutral

• polarized

Tags

NGSS.MS-PS2-3

A method to create or generate static electricity in a material is shown in the picture. This is an example of charging by...

• conduction

• friction

• polarization

• induction

Tags

NGSS.MS-PS2-5