Electric charges and forces

Atoms are electrically ___________

• Neutral

• Positively charged

• Negatively charged

• particles

Two types of particles are found in nucleus: one is _____ and the other is ________

• neutral

• Positively charged and neutral

• Negativly charged

• Both A and C

what is the SI unit of charge ?

• watt ( W )

• Joule ( J )

• Coulomb ( C )

• Poise ( P )

What is the meaning of conduction ?

• Having to objects TOUCH each other and transfer protons from one object to the next.

• Having to objects touch each other and transfer electrons from one object to the next.

• Having to objects touch each other and seperate protons from one object to the next.

• None of the above

How to charge an object?

• By conduction and induction

• By friction

• A and B

• By static electricity

Like charges

• Hug

• Repel

• Attract

• Hate each other

Unlike or opposite charges

• Attract

• Repel

• Hug

• Hate each other

what happens when you rub the balloon against your hair?

• Balloon lose protons and hair gain protons

• Balloon lose electrons and hair become neutral

• Balloon gain electrons and hair lose electron

• both become neutral

If you rub a balloon against your hair and then try to stick to the wall. Will it stick? And why?

• Yes, because opposite charges attract

• No, because like charges repel

• No, because it causes your hair to stand

• both are neutral

what is grounding?

• A and C

• the transfer of protons from an object to the ground.

• When an object fall on the ground.

• Electrical connection to earth.