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25 Cards in this Set
- Front
- Back
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SINUSOIDAL WAVEFORM
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True Waveform.
Voltage and Current is directly proportional |
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FREQUENCY
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Number of cycles in 1 Second. (Hz).
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PERIOD
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The time that is required for a wave to complete one FULL CYCLE.
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WAVELENGTH
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The physical distance required for a wave to complete one full cycle.
Lambda |
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LAMBDA is Wavelength
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Measured in Meters.
L=C/f C=Speed of Light 300M/f |
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RF
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Radio Frequency
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AF
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Audio Frequency
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What is Required to Produce an AC waveform? (3)
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1. Armature Wire (Conductor)
2. Magnetic Field 3. Movement (Relative Motion) *faster the movement, voltage goes up/frequency goes up. *add more magnetic field(magnets), frequency goes up. |
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INDUCTOR
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Physical component that opposes a change in current.
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INDUCTANCE
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Characteristic of an Inductor:
Opposes a change in current in an AC Circuit. |
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Unit of Inductance (L)(H)
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HENRY (H)
Symbolized by (L) |
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Factors that Affect Inductance (6)
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1. Number of Turns
2. Cross Sectional Area 3. Length of the Coil 4. Spacing of turns 5. Layering 6. Core Material |
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INDUCTIVE REACTANCE (XL)(ohms)
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Opposition to Alternating Current.
*DC has zero frequency, so XL of a DC is zero. |
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ELI
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In a purely Inductive Circuit:
Voltage (E) leads Current (I) by 90degrees. |
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IMPEDANCE (Z) (ohms)
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The Total opposition to Alternating Current in a circuit.
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CAPACITOR
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DEVICE THAT STORES ELECTRICAL ENERGY IN AN ELECTROSTATIC FIELD.
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ELECTROSTATIC FIELD
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Difference of potential or voltage which exists between two points in an electrical cirucuit.
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CAPACITANCE (C) = f
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Property of any circuit that OPPOSES the change in Voltage.
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FACTORS THAT AFFECT CAPACITANCE (3)
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1. Plate Size (plate area) - the larger the area, the larger the capacitance.
2. Distance Between Plates - Stronger electrostatic field when close. 3. The Dielectric (type) |
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CAPACITATIVE REACTANCE (XC) = ohms
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Capacitators Resistance to Alternating Current in a circuit.
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IMPEDANCE (Z)
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The Total opposition to Alternating Current in a circuit
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Insulator
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a material whose electrons can not easily escape thier orbits
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ICE
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In a purely capacitative current (I) leads Voltage (E) by 90degrees.
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INDUCTOR (L) (H)
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Coil of Wire; Electrical component that creates an electromagnetic field to oppose the change in current.
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RESONANCE
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The frequency at which the inductive reactance and capacitive reactance values are equal.
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