Static Electricity

Objects with equal amounts of positive and negative charges are ______________.

• electrically charged

• electrically neutral

• positively charged

• negatively charged

An object that has more electrons than protons carry an excess of _________.

• electric charges

• static charges

• negative charges

• positive charges

The standard unit for electric charges is _________.

• Coulomb

• Newton

• Hertz

• Watt

What do you call the process in which excess electric charges are discharged from a charged material to the Earth?

• charging by induction

• charging by conduction

• electric shock

• grounding

The negatively charged bottom of storm clouds causes the ground to be _____________ by means of charging by induction.

• positively charged

• negatively charged

• electrically neutral

• electrically discharged

Which of the following will likely get an excess of positive charges after charging by friction?

• rubber balloon

• wood

• PVC

• human hair

When a spark goes from a negatively charged object to a positively charged object, the spark that occurs results from the movement of _______________.

• electric charges

• electrons

• protons

• neutrons

Two neutral objects touching each other gain opposite charges after a negatively charged object is brought near one of them. This situation is an example of ________.

• charging by contact

• charging by friction

• charging by conduction

• charging by induction

Which of the following is an example of charging by induction?

• sticking a rubber balloon to a wall after rubbing it against wool

• clothes sticking together after tumbling in the dryer

• rubbing a balloon against a person's hair

• walking across a carpet on your socks

A positively charged rod with only a few electrons is allowed to touch a neutral metal sphere, eventually charging it. This charging method is called ________.

• charging by friction

• charging by induction

• charging by polarization

• charging by conduction