FACIAL ELECTRICAL UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

FACIAL ELECTRICAL UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS


Question:
UVA
Answer:
long wave length 315-400nm
Question:
UVB
Answer:
medium wave length 280-315nm
Question:
UVC
Answer:
short wave length 200-280nm
Question:
Nanometer
Answer:
equal to a one-millionth of a millimeter
Question:
200/390 Nm
Answer:
Ultra-violet Rays
Question:
400/700 Nm
Answer:
Visible Light
Question:
700/4000Nm
Answer:
Infra-Red Rays
Question:
Hertz
Answer:
a measurement of frequency
Question:
Ohms Law
Answer:
the relationship between Volts, Amps and Ohms eg 12V/3amps= 4ohms
Question:
Watts or Kilowatts

, Answer:
the unit of measure of electrical power
Question:
Transformer
Answer:
Device used to change the voltage of an alternating current
Question:
Direct Current (D.C.)
Answer:
All flow in one direction - -> +
Question:
Alternating Current (A.C.)
Answer:
Current flows one direction then another several times a second
Question:
Inverse square law
Answer:
the intensity of the rays from a point source varies with the
square of the distance from the source D=1,B=2 D=2, B=1/4 D=3, B=1/4
Question:
Electromagnetic Spectrum
Answer:
Different Radiation of wave lengths
Question:
Interferrential current
Answer:
combination of two currents which is the difference of the two currents
Question:
Rheostat
Answer:
changes the flow of a current in a circuit
Question:
capacitor
Answer:
a device that stores electrical` charges and smooths bumps in DC produced by
a rectifier
Question:
Potentiometer
Answer:
varies the voltage in a circuit allowing the current to be turned up from zero
Question:
switch