ch18 - Chapter 18 Electric Forces and Electric Fields 18.1...

Info iconThis preview shows pages 1–15. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 18 Electric Forces and Electric Fields
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
18.1 The Origin of Electricity The electrical nature of matter is inherent in atomic structure. kg 10 673 . 1 27 - × = p m kg 10 675 . 1 27 - × = n m kg 10 11 . 9 31 - × = e m C 10 60 . 1 19 - × = e coulombs
Background image of page 2
18.1 The Origin of Electricity In nature, atoms are normally found with equal numbers of protons and electrons, so they are electrically neutral. By adding or removing electrons from matter it will acquire a net electric charge with magnitude equal to e times the number of electrons added or removed, N . Ne q =
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
18.1 The Origin of Electricity Example 1 A Lot of Electrons How many electrons are there in one coulomb of negative charge? Ne q = 18 19 - 10 25 . 6 C 10 1.60 C 00 . 1 × = × = = e q N
Background image of page 4
18.2 Charged Objects and the Electric Force It is possible to transfer electric charge from one object to another. The body that loses electrons has an excess of positive charge, while the body that gains electrons has an excess of negative charge.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
18.2 Charged Objects and the Electric Force LAW OF CONSERVATION OF ELECTRIC CHARGE During any process, the net electric charge of an isolated system remains constant (is conserved).
Background image of page 6
18.2 Charged Objects and the Electric Force Like charges repel and unlike charges attract each other.
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
18.2 Charged Objects and the Electric Force
Background image of page 8
18.3 Conductors and Insulators Not only can electric charge exist on an object, but it can also move through and object . Substances that readily conduct electric charge are called electrical conductors . Materials that conduct electric charge poorly are called electrical insulators.
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
18.4 Charging by Contact and by Induction Charging by contact.
Background image of page 10
18.4 Charging by Contact and by Induction Charging by induction.
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
18.4 Charging by Contact and by Induction The negatively charged rod induces a slight positive surface charge on the plastic.
Background image of page 12
18.5 Coulomb’s Law
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Coulomb’s Law COULOMB’S LAW The magnitude of the electrostatic force exerted by one point charge on another point charge is directly proportional to the magnitude of the charges and inversely proportional to the square of the distance between them. 2
Background image of page 14
Image of page 15
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 52

ch18 - Chapter 18 Electric Forces and Electric Fields 18.1...

This preview shows document pages 1 - 15. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online