Electric Charge and Electric Field

Question 1

what are the two kinds of electric charges?

Answer 1

positive and negative charge

Question 2

charge that is possessed by electrons

Answer 2

negative charge

Question 3

charge that is possessed by protons

Answer 3

positive charge

Question 4

true or false: Electric charge is always conserved in
an isolated system.

Answer 4

true

electrification is due to a transfer of charge from 1 object to another

Question 5

it is the standard symbol used for charge as a variable

Answer 5

q

quantized

Question 5

what is the value of charge of protons and electrons?

Answer 5

1.6 x 10-19 C

Question 5

these are materials in which some of the electrons are free electrons

Answer 5

electrical conductors

These electrons can move relatively freely through the material.

Question 6

these are materials in which all the electrons are bound to atoms.

Answer 6

electrical insulators

These electrons can not move relatively freely through the material.

Question 7

give some examples of good conductor materials

Answer 7

• copper
• aluminum
• silver

Question 8

give some examples of electrical insulators materials

Answer 8

• glass
• rubber
• wood

Question 9

true or false: The electrical properties of semiconductors cannot be changed by the addition of controlled amounts of certain atoms to the material.

Answer 9

false

Question 9

this material has the electrical properties somewhere between insulators and conductors

Answer 9

semiconductors

Examples of semiconductor materials include silicon and germanium.

Question 10

true or false: Charging by induction does not requires
contact with the object inducing the charge.

Answer 10

false

it does requires contact with the object inducing the charge

Question 11

he is a french physicist and has a major contribution in areas of electrostatics and magnetism

Answer 11

Charles Augustin de Coulomb

Question 11

it refers to a particle of zero size that carries an electric charge

Answer 11

point charge

Question 11

electrical forces obeys what law?

Answer 11

newton’s third law

Question 11

who developed the concept of a field in terms of electric fields.

Answer 11

faraday

Question 12

the electric force on the test charge per unit charge.

Answer 12

electric field

Question 13

here, The number of field lines leaving the positive charge equals the number of lines terminating on the negative charge.

Answer 13

dipole

Question 14

here, The same number of lines leave each
charge since they are equal in magnitude.

Answer 14

like charges

Question 15

here, Two lines leave the positive charge for
each line that terminates on the negative charge.

Answer 15

unequal charges