Physics

Question 1

Relationship between ELECTRIC FORCE and CHARGE

Answer 1

Electric force INCREASES as charge INCREASES

Question 2

Relationship between ELECTRIC FORCE and DISTANCE

Answer 2

Electric force DECREASES as DISTANCE increases

Question 3

Relationship between CROSS-SECTION AREA and RESISTIVITY

Answer 3

The bigger the CROSS-SECTION AREA, the less RESISTIVITY (exponentially)

Question 4

Relationship between LENGTH and RESISTIVITY

Answer 4

The longer the LENGTH, the higher the RESISTIVITY (linear)

Question 5

Electric Force

Answer 5

Newtons(N)

Question 6

Charge

Answer 6

Coloumbs(C)

Question 7

Electrical Fields

Answer 7

N/C

Question 8

Power

Answer 8

Watts

Question 9

Energy

Answer 9

J

Question 10

Resistance

Answer 10

R

Question 11

What are the three methods of charging?

Answer 11

conduction, induction, polarization

Question 12

Charge by contact is called…?

Answer 12

conduction

Question 13

What are two forms of conduction?

Answer 13

charge by friction and charge by direct contact

Question 14

What happens when something is charged by friction?

Answer 14

begin with two neutral objects and rub them together to transfer electrons from A to B (when A has a net (+) charge and B has a net (-) charge)

Question 15

What happens when something is charged by direct contact?

Answer 15

begin with at least one charged object, touch the charged object A to neutral object B, electrons are transferred from charged object A to neutral object B, B now has a net (-) charge

Question 16

Charge without contact is called…?

Answer 16

Induction

Question 17

What happens when something is charged by induction?

Answer 17

It is grounded: when an object is connected to the earth by a wire, pipe, finger, etc. so that electrons can transfer to or from the earth.

Question 18

What happens when something is charged by polarization?

Answer 18

A separation of charges in a neutral object

Question 19

The net charge created in any process is always

Answer 19

zero

Question 20

Van de Graff generator

Answer 20

A Van de Graff generator is a machine that
creates and stores static charge. A rubber belt is
spun by a motor. There are metal combs that
are placed close to the belt to collect the
electrons that are rubbed off the belt as it spins.
These electrons end up on the big, hollow
sphere.