Electrostatic Forces

Which has a charge with the greatest magnitude?

• An object with a charge of 0.

• An object with a charge of -2

• An object with a charge of +2

• An object with a charge of -3

The ___________ _____________ is the force of attraction or repulsion between objects due to their charges.

• electric charge

• electric force

• distance

• variable

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Can neutral objects become charged?

• Yes, by wishing it to be so.

• No, never.

• Yes, by being near or in contact with a charged object.

• No, not under any circumstance.

When distance increases, electrostatic force ____________; we call this relationship ____________ proportional

• decreases;directly

• decreases;inversely

• increases;inversely

• increases;directly

Tags

NGSS.MS-PS2-3

Two like charges

•  neutralize each other.

• repel each other. 

• must be neutrons. 

• attract each other.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The correct explanation for why the plastic strip becomes positively charged is that ...

• the plastic strip acquired extra protons from the cotton.

• the plastic strip acquired extra protons from the charging process 

• protons were created as the result of the charging process

• the plastic strip lost electrons to the cotton during the charging process 

Consider the conduction charging shown. 

• Electrons move from the insulating stand into the sphere.

• Protons move from the bar into the sphere.

• Electrons move from the charged metal bar into the sphere.

• Protons move from the sphere into the negatively charged bar.

Tags

NGSS.MS-PS2-3

A glass rod becomes positively charged when it is rubbed with silk. This net positive charge accumulates because the glass rod

• gains electrons

• loses electrons

• gains protons

• loses protons

Tags

NGSS.MS-PS2-3

A balloon is rubbed against a student's hair and then touched to a wall. The balloon sticks to the wall due to

• magnetic forces between the particles of the balloon and the particles of the wall

• electrostatic forces between the particles of the balloon and the particles of the wall

• magnetic forces between the particles of the wall

• electrostatic forces between the particles of the balloon

Tags

NGSS.MS-PS2-3

When a plastic rod is rubbed with wool, the wool acquires a positive charge because

• protons are transferred from the wool to the rod

• protons are transferred from the rod to the wool

• electrons are transferred from the rod to the wool

• electrons are transferred from the wool to the rod