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What is the frequency of a wave? - ANSWER ✓ number of cycles per second
What are three types of inductors? - ANSWER ✓ air core, iron core, variable
What is inductance? - ANSWER ✓ ability of a conductor to induce voltage when
"cut" by magnetic flux
What is the basic unit of inductance? - ANSWER ✓ Henry
What factors affect inductance? - ANSWER ✓ Number of turns, distance between
windings, cross sectional area, permeability
More turns in inductor results in (higher/lower) inductance? - ANSWER ✓ higher
Shorter inductor equals (more/less) flux density? - ANSWER ✓ more
Higher cross sectional area of inductor equals (higher/lower) inductance? -
ANSWER ✓ higher
What is inductive reactance? - ANSWER ✓ amount of opposition to current flow
What is inductive reactance measured in? - ANSWER ✓ Ohms
Voltage leads current by how many degrees in inductive circuit? - ANSWER ✓ 90
What does ELI stand for? - ANSWER ✓ Voltage leads current in inductive circuit
, What is impedance (Z) - ANSWER ✓ combined opposition to current flow from
resistor and inductor
What replaces R in a RL circuit? - ANSWER ✓ Z
What is real power? - ANSWER ✓ power consumed by resistor (Pr = Vr x Ir)
What is reactive power? - ANSWER ✓ power in the inductor (PL = VL x IL)
What is apparent power? - ANSWER ✓ combo of real and reactive power (Pa =
Va x It)
What is the resistance of a good inductor? - ANSWER ✓ Low (20-200 ohms)
In a RL series circuit, as phase angle approaches 0 degrees, the circuit is mostly
(resistive/inductive) - ANSWER ✓ Resistive
What two things are in phase across a resistor? - ANSWER ✓ current/voltage
What component is placed in series with input in a low pass RL filter? -
ANSWER ✓ Inductor
The output is taken across what component in low pass RL filter? - ANSWER ✓
Resistor
In a low pass RL filter, as frequency increases output voltage (increases/decreases)
- ANSWER ✓ Decreases
Cutoff frequency produces _____% of the max voltage? - ANSWER ✓ 70.7%
(0.707)
What component is placed in series with input in a high pass RL filter? -
ANSWER ✓ Resistor
Output voltage is taken across what component in a high pass RL filter? -
ANSWER ✓ Inductor