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11 Cards in this Set
- Front
- Back
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what are the dimensions of self inductance? |
L²M¹ T–² I–² |
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what is the breakdown of the unit of self inductance ? |
L = e/(di/dt) = (volt*second)/ampere = henry |
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what are the factors which affect self inductance |
-number of turns -shape -area of coil -material of core(L is high for iron cobalt or nickel as the core) |
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what are the dimensions of mutual inductance |
same as those of self inductance |
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what are the factors affecting mutual inductance |
-shape -size of the coils -number of turns -separation between the coils -medium between the coils |
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define self Inductance |
the phenomenon of production of induced EMF in a coil due to the change of current in the same coil |
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define mutual inductance |
the phenomenon of production of an induced EMF in one coil due to the change in the current flowing through a neighbouring coil |
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define the coefficient of self inductance |
the coefficient of self Inductance is given by the ratio of the induced EMF in the coil to the rate of change of current in the same coil |
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define mutual inductance |
it is the ratio of EMF induced in one coil to the rate of change of current in the other coil |
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what is a choke coil used for |
it is used in -flourescent lamps - mercury lamps it is a coil of copper wire wound around and insulating cylinder it acts as -opposition in AC circuit -resistor in DC circuit it controls -current to -maintain discharge uniform a resistor used instead will cause great loss of electrical energy due to power loss by joules heating -it is connected in series with the fluorescent lamp to decrease current gradually |
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what is a choke coil used for |
it is used in -flourescent lamps - mercury lamps it is a coil of copper wire wound around and insulating cylinder it acts as -opposition in AC circuit -resistor in DC circuit it controls -current to -maintain discharge uniform a resistor used instead will cause great loss of electrical energy due to power loss by joules heating -it is connected in series with the fluorescent lamp to decrease current gradually |
