SCI 111 – Introduction to Physics and Chemistry

Chapter 6 FOCUS: Electricity and Magnetism

Electricity

·  State the basics about Electric Charge and Electrical Forces

·  Define Electrostatic Charge and list the three ways an object can become electrostatically charged

·  Differentiate between an electrical conductor and an electrical insulator

·  State the fundamental unit of charge, Coulomb, and know Coulomb’s Law (Equation 6.2)

SCI 111 Chapter 6 Focus: page 1 of 4

Electricity Cont’d

·  Know Equation 6.3: Relating electrical potential difference to work and charge

o  Define “volt (V)” and voltage.

·  Understand the meaning of Electric Current (Equation 6.4) and its units (Amperes or Amps)

·  Know the components of a simple electric circuit (Figs 6.10 and 6.11)

·  Describe the nature of current (Figs 6.12 and 6.14)

o  3 Fundamental Conclusions on page 152

o  DC versus AC


Electricity Cont’d

·  Define Electrical Resistance. Know and make calculations using Ohm’s Law (Equation 6.5)

·  Electrical Power and Electrical Work

o  Know the common parts of all electrical circuits

o  Electrical Power and units (Equation 6.6)

o  Compute the operating cost of an electrical device

o  Household circuits and safety including Circuit Breaker, 3-pronged plug, polarized plugs, GFIs

·  Good Synopsis of Electrical Quantities and Units in Table 6.2 on page 157

SCI 111 Chapter 6 Focus: page 1 of 4

Magnetism

·  Know the difference between Geographic and Magnetic North Pole (magnetic declination)

·  Electromagnets (Fig 6.27)

o  Components and strength changes

o  Solenoid: What is it? What are its uses?

o  Applications of Electromagnets:

1)  Electric Meters: Galvanometer (Fig 6.28)

2)  Electromagnetic Switches (relays) (Fig 6.29)

3)  Telephones and loudspeakers (Fig 6.30)

4)  Electric Motors (Fig 6.31)

·  Electromagnetic Induction (Fig 6.32)

o  Know what it is, how it is produced, and what the magnitude of the induced voltage is proportional to

o  Applications: Basic operations or benefits of electromagnetic induction within:

1)  Generators

2)  Transformers

SCI 111 Chapter 6 Focus: page 1 of 4