Physics chapter 15+16 multiple choice

A combination of two electrons and three protons would have a net charge of

+1.6x10^-19

A stream of water is deflected toward a nearby electrically charged object that is brought close to it. The sign of the charge on the object is

Can't be determined by the data

A balloon is charged and then climbed to a wall. The sign of the charge in the balloon is

Can't be determined by this data

How does the magnitude of the electric force between two points charges change as the distance between them increases

Decreases

An electron is just above a fixed proton. The direction of the force in a proton is

Down

At a point in space, an electric force acts vertically upward on an electron. The direction of the electric field at that point is

Down

Two electrons are placed on the y axis, one at y=20 and one at y= -20. What is the direction of the field at the location y=0 and x=40

Down

What is the field location at y=40 and x= 0

Down

If you wanted to change the amount of charge on each of the particles by the same amount so that the force between them went back to its original value, what would you do

Increase each charge by three times

The SI unit of electric field are

N/C

A rubber rod is rubbed with fur, so that the fur becomes positive. The rod is then used to charge an electroscope. The charge on the electroscope will be

Negative

The direction of the electric field at the surface of a charger conductor under electrostatic conditions is

Perpendicular to the surface

How is the magnitude of the electric field due to a point charge reduced when the distance from that charge is tripled

Reduced one ninth to its original value

If the distance between two charged particles is tripled, what happens to the magnitude of the electric force each exerts on each other

Reduced to one ninth its original value

Which one feels the greater magnitude of force

They are the same

Compared with the electric force, the gravitational force between two protons is

Very much smaller

An uncharged thin metal slab is placed in an external electric field that point horizontally to the left. What is the electrics field inside the slab

Zero

In an electrostatic equilibrium is the electric field just below the surface of the charged conductor

Zero