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Unit 1

Electricity

Henry University

Department of Engineering Introduction to Electricity (ENGR 220)
This course provides a foundation for advanced study of electrical systems. It is divided into four sections. The first section focuses on electrons and other particles that hold a charge. Understanding how these particles act is incredibly important. Next, the course will move to electric currents. This includes
DC AC alternating current (AC) and direct current (DC). Properties of electricity, such as voltage, will also be covered.
Ohm's Law and resistance will be introduced as well. The third section will introduce the units we use to measure electricity. These include volts, ampers, ohms and watts. An understanding of currents prepares students for the fourth section. This sections focuses on circuits. By the end of the semester, students will have a working knowledge of electrical terms.


1.Read the course description. Then, choose the correct answers.

1.What is the course mainly about?

A building power sources that use electricity
B designing electrical systems
C performing experiments with currents
D examining properties of electrical circuits
2.Which topic is addressed in the section before much something opposes currents?
A circuits C charged particles
B resistance D units of measurement
3.Which is true about the course's fourth section?
A. It introduces electrons.
B. It covers the difference between AC and DC.
C. It focuses on Ohm's Law.
D. It combines information from other sections.
2. Match the words (1-8) with the definitions (A-H).

1.volt 5.electron
2.ohm 6. ampere
3.watt 7. circuit
4.charge 8. resistance

A. a measure of how the flow of electricity
B. a unit of electrical power
C. the amount of electricity something holds
D. a unit that measures the force of a current
E. a unit that measures resistance of a current
F. a unit that measures the flow of a current
G. a complete, closed path through which an electrical current can flow
H. a negatively charged subatomic particle