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WorksheetsInductors
Total questions: 14
Worksheet time: 19mins
If you reverse the direction of movement of a magnet influencing a coil, what happens to the current?
reverses
increases
stays same
decreases
Electromagnetic induction can occur in any conductor, regardless of whether it's a straight piece of wire or coil.
True
False
The current induced in a second piece of wire develops it's own magnetic field which in turn will induce a current in the original wire of reverse polarity. What is this called?
Opposite/opposing reactance
Counter/Back EMF
Mirror Effect
Magic
Mutual inductance is NOT dependant on which of the following:
number of turns
physical size of each coil
Position of coils
thickness of wire
What is the greatest inductance core material out of the following?
Air
Copper
Iron
If a transformer secondary draws more current, the primary Back EMF will...
reduce
increase
no effect
If two coils are positioned such that all of the flux from the primary passes onto the secondary, this is called
unity
saturation
losses
The symbol and units of inductors are
L (Henrys)
C (Conductance)
F (Flux)
C (Farads)
Inductors...
oppose change
like change
Inductors are NOT also known as...
chokes
reactors
coils
shunts
The effect on inductance by adding extra coil layers...
increase L
decrease L
There are two 10H inductors in series. What is the total inductance?
20
10
5
there are two 10H inductors in parallel. Total inductance is...
5
10
20
In inductive circuits... (use CIVIL)
current lags voltage
current leads voltage
