Static Electricity

Static Electricity

Chapter 6 revision

Multiple Choice

Lightning occurs because ___.

• the negative charges at the bottom of clouds are attracted to the positive charges on the ground.

• the positive charges at the bottom of clouds are attracted to the negative charges on the ground.

• the positive and negative charges inside clouds are attracted to each other

• All of these reasons are correct.

Multiple Choice

Bending water with a charged balloon is an example of what type of charging (charging an object without touching)

• friction

• induction

• conduction

Multiple Choice

What method of static charging is shown in this picture

• Polarization
• Friction
• Induction
• Conduction

Multiple Choice

Charge separation in clouds is one way

• that freezing rain occurs
• that lightning occurs
• that low pressure system occurs
• that a tornado occurs

Multiple Choice

What is the major difference between static electricity and current electricity?

• Current electricity involves a continuous flow of neutrons; static electricity is a sudden transfer of protons
• Current electricity can be deadly; static electricity is almost always safe
• In current electricity, there's a single transfer of electrons; in static electricity, there's a steady flow of electrons
• Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons

Multiple Choice

Which one of these objects is a good insulator

• Copper wire

• Glass

• Aluminum

• Gold

Multiple Choice

Static electricity is 

• The balance of electrical charge on an object
• The imbalance of electrical charge on an object
• The discharge of electrical charge
• The build up of protons in the nucleus of an atom 

Multiple Choice

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

Multiple Choice

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

Multiple Choice

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.

Multiple Choice

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

• reduction
• induction
• conduction
• friction

Multiple Choice

A region around a charged particle that can exert a force on another charged particle is called an

• electric pulse.
• electric charge.
• electric force.
• electric field.

Multiple Choice

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.

Multiple Choice

In a neutral atom, the number of electrons is equal to the number of _______.

• Neutrons

• Orbits

• Protons

• subatomic particles

Multiple Choice

In a neutral atom, the number of electrons is equal to the number of _______.

• Neutrons

• Orbits

• Protons

• subatomic particles