Annex B02 Intro to Basic Electrical Concepts

Question 0

Resistance

Answer 0

Opposition to the flow of electric current (opposite of conductance)

Question 1

Conductance

Answer 1

Ability to allow the flow of electric current

Question 2

Term used to measure the magnitude of voltage

Answer 2

Voltage

Question 3

Electron Current

Answer 3

Directed flow of electrons

Question 4

Term used to measure the magnitude of current

Answer 4

Amps

Question 5

Terms used to measure the magnitude of resistance

Answer 5

Ohms

Question 6

Four (4) factors that affect resistance

Answer 6

Type of material
Cross sectional area
Conductor length
Temperature

Question 7

Alternating Current vs Direct Current

Answer 7

AC- current that constantly changes in amplitude which reverses direction at regular intervals

DC- flows only in one direction and the amplitude of current is determined by the number of electrons flowing past a point in a circuit in one second. Amplitude is constant in direct current.

Question 8

Wave

Answer 8

Disturbance that moves through a medium

Question 9

Wavelength

Answer 9

Distance travelled by the wave to complete one full cycle

Question 10

Frequency

Answer 10

Number of complete cycles completed each second.

Question 11

In phase vs Out of Phase

Answer 11

When two (2) sine waves are precisely in step with one another, they are IN PHASE. Amplitude of the waves can be different or the same.

If waves do not go through their max/min points at the same instant of time, PHASE DIFFERENCE exists between the two waves and they are said to be OUT OF PHASE.