Deck 3: Electrostatics

Question 1

Static electricity is a charge that is stationary; it is not a current.

Answer 1

True

Question 2

A charged electroscope will indicate whether an unknown charge is positive or negative.

Answer 2

True

Question 3

Materials in which electrons move freely are called conductors.

Answer 3

True

Question 4

Many years ago, people were puzzled as to just how two objects could exert ____ on each other when they were some distance apart with no material connection between them.

A)pressure
B)force
C)weight
D)electrical charges

Question 5

A charged object always affects other objects in its neighborhood by ____ electrons within the nearby object.

A)neutralizing
B)speeding up
C)attracting or repelling
D)moving

Question 6

The distribution of electrical charges in ____ has been mapped, but as yet, no one knows just how the charges are formed.

A)thunderclouds
B)water
C)soil
D)tree branches

Question 7

An induced charge on one object is caused by the approach of another charged object, without contact between the two objects.

Question 8

The difference in ____ energy between two objects is expressed by the word voltage.

A)potential
B)mechanical
C)chemical
D)electrical

Question 9

It is not possible to insulate against ____, but protection can be provided by giving it an easy path to ground.

A)electricity
B)electrical conduction
C)electrical induction
D)lightning

Question 10

Sandpaper grit can be made to lie flat as it is being applied to the paper backing by giving the sand particles a positive charge and the glue-covered paper backing a negative charge.

Question 11

Electrostatic lines of force show the existence of a very real force between two electrically charged objects.

Question 12

A neutron forcibly taken away from one neutral object and put on another neutral object has gained potential energy.

Question 13

A lightning arrester for TV and radio antennas is simply a grounded wire brought close to, but not touching, the antenna.

Question 14

Smoke precipitators charge the smoke particles, which are then collected on ____ charged screens.

A)negatively
B)oppositely
C)positively
D)similarly

Question 15

The Van de Graaff generator is used to create high voltages for speeding up ____ particles in atom-smashing experiments.

A)static
B)neutralized
C)induced
D)charged

Question 16

Chester F.Carlson was the inventor of the process known as ____, or dry copying.

A)chronography
B)mimeography
C)micrography
D)xerography

Question 17

Grain dust, flour, wood dust, and cotton lint have produced disastrous explosions, so the prevention of ____ helps avoid such dust explosions.

A)vibrations
B)potential energy
C)static charges
D)direct currents

Question 18

Electrostatic conduction is the process by which the neighboring object acquires a charge.

Question 19

Industries always use static charge as a tool.

Question 20

The ____ was once widely used to compare electrical charges and served as a crude voltmeter.

A)lightning arrester
B)electroscope
C)generator
D)conductor