Electrician-basic Flashcards
What is the correct unit of measure for CURRENT?
Amps
What is the opposition to current called?
Resistance
A nucleus of an atom contains what type of charge?
Positive charge
What is the uniform movement of electrons in a specific direction known as?
Current flow
How many electrons in a valence ring is considered a good conductor?
Atoms with 1 or 2 electrons in their valence ring is considered a good conductor.
Increase in voltage in a circuit will cause current to do what?
Increase.
Increase voltage = increase current
A battery produces direct current by converting ____ energy to ____ energy.
A battery produces direct current by converting Chemical energy to Electrical energy.
What is another name for a secondary cell battery?
Accumulators
Conductors must be moved in what direction to produce electricity in a DC generator?
Perpendicular
TRUE or FALSE?
DC is a constant output that does NOT vary with respect to time?
TRUE.
DC is a constant output which doesn’t vary with time.
What type of test equipment is utilized to measure AC in a sine wave format?
Oscilloscope
What term is used when the amount of voltage reaches the maximum positive position on a sine wave?
Peak Value
Effective value is also known as what?
RMS
How long does it take to complete one continuous sine wave?
It takes one second to complete.
What principle does an AC generator use to generate current?
Electromagnetism
When a conductor is formed into a coil, it becomes what electrical term?
Inductor
What letter symbol is used for the term Inductance?
“L”
How many stages does a capacitor perform?
Four. 1-charging 2-charged 3-discharging 4-discharged
What unit of measurement is used for capacitance?
Farad
Capacitive reactance is measured in what unit?
Ohms
What is defined as the total opposition to flow in an AC circuit?
Impedance
TRUE or FALSE:
Apparent power is the VOLTAGE x CURRENT in any circuit?
True
Which type of electrical equipment is used for overcurrent protection?
Circuit Breaker or fuses
