Static Electricity

If two charges repel each other, the two charges must be

• Positive and neutra
• Positive and negative
• positive and neutral
• negative and negative

Tags

NGSS.HS-PS2-4

An object becomes charged when the atoms in the object gain or lose

• electrons
• protons
• neutrons
• all of the above

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that

• friction destroyed electrons in the rod.
• the silk has become negatively charged.
• protons have moved to the rod.
• glass attracts more protons.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Charging by ____ occurs when electrons are transferred from one object to another by direct contact.

• reduction
• induction
• conduction
• friction

The "Q" in Coulomb's Law stands for

• the mass of charges objects.
• the distance of charged objects.
• the force of charged objects.
• the charge of charged objects.

Tags

NGSS.HS-PS2-4

Force between two bodies having charges 5.0 x 10² μC and 1.0 x 10² μC separated by distance of 0.50 m in air is

• 1800 N
• 1.0 x 10³ N
• 2200 N
• 3.0 x 10² N

Tags

NGSS.HS-PS2-4

A positive charge of 4.0 µC exerts an attractive force of 8.0 N on an unknown charge 20.0 cm away. The unknown charge is

• + 8.9 µC 
• - 8.9 µC
• + 4  µC
• - 44  µC 

Tags

NGSS.HS-PS2-4

A glass rod rubbed against your hair gains a charge of -14.0 nC. What is the electric force between the balloon and your hair when the two are separated by a distance of 7.1 cm?

• 3.5 x 10⁴ N
• -3.5 x 10⁴ N
• - 3.5 x 10^-4 N
• 3.5 x 10^-4 N

Tags

NGSS.HS-PS2-4