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23 Cards in this Set
- Front
- Back
the property of inductance offers opposition to which of the following quantites
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constatn current
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what is the symbol for inductance
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L
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what is the unit of measurement of inductance
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henry
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if 9 volts are inducded in a conductor when the current changes by 4.5 amperes in one second what is the total inductance of the cicruit
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40.0 henries
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what physical property is similar to inductance?
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inertia
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the difference in potential across a resistor, created by an current through the resistor is an example of which force?
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electromotive
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when a magnetic field moves through a stationary conductor the elecotrons in orbit are affected in what manner
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they are dislodged from orbit
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self-enduced EMF is also known as what force?
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counter electromotive force
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according to Lenz law, the induced EMF produced by a change in current in an inducteive circuit tends to have what affect on current?
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it opposes eihter a rise or fall in current.
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the direction of induced voltage in an inductor may be found by the application of which rule?
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left hand rule for generators
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left hand rule of generators states that the thumb points in the direction of what?
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conductor
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when the voltage is removed from a current carrying conductor a volage wil be induced by what?
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the collasping magnetic field.
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how are conductors classified by?
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core type
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normally most coils have cores composed of either air or?
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soft iron.
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when the number fo turns is increased from 2 to 4 the total inductance will increase by a foactor of
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two
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if the radius of a coil is doubled the inductance is increased by a factor of what?
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four
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what is the folrmula for copper loss
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p+I(2)R
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inductors experience copper loss for what reason?
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beacuse all inductors have resistance which will dissipates power
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what erm applies to the power loss in the iron core inductor due to the current inducted in the core?
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eddy-current loss
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pwer consumced bu an iron core inductor in reversing the magnetic field of the core is termed as what tupe of loss?
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hysterssis-loss
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when does mutual inductance occurs between inductors?
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whenever the flux of one inductor causes an EMF to be inducted in another inductor
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mutual inductance occurs between two coils is affected by what factor
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the physical demensions of the coils.
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the co-effiecient of coupling between two coils is a measure fo what factor
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the magnetic flux ratio linking the coils.
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