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WorksheetsInductors fact check
Total questions: 13
Worksheet time: 6mins
What is the symbol for Inductance?
I
Z
XL
L
What is the symbol for Inductive Reactance?
L
XL
XC
R
What is the formula for Inductive reactance?
XL =2πfL
XL = 2πfL1
XL =2πHC
XL =VπfL
As a general rule, inductors oppose change in________________
Current
resistance
time
power
Where current and voltage are in phase in an ac system, it would be regarded as purely resistive .
True
False
The unit of inductive reactance is the ohm.
True
False
The unit of inductance is the farad.
True
False
Does the current lead or lag the voltage in an inductor?
Lead
Lag
The opposition to current flow in a pure inductor is called the___________________
Impedance
Resistance
Inductive Reactance
phase angle
Tick all those which have an inductor (coil) in them.
Fluorescent Lamp
Motor
Incandescent lamp
LED
Transformer
What is the phase relationship between voltage and current in a purely inductive circuit?
Voltage leads current by 90 degrees
Current leads voltage by 90 degrees
Voltage and current are in phase
Voltage lags current by 90 degrees
Which of the following components stores energy in a magnetic field?
Capacitor
Resistor
Inductor
Diode
What happens to the inductive reactance if the frequency of the AC supply is doubled?
It remains the same
It is halved
It is doubled
It becomes zero
