5838464
Descripción
Test por Med Student , actualizado hace más de 1 año
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Creado por Med Student
hace más de 10 años
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Pregunta 1
Pregunta
Materials which have no free charges are called
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Dielectrics
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Transistors
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Polarisers
Pregunta 2
Pregunta
When a dielectric is placed in an electric field, there is a displacement of the electron cloud relative to the nucleus(the inner circle).
This refers to
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Electric polarisation
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Ionic polarisation
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Dipolar polarisation
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Macrostructural polarisation
Pregunta 3
Pregunta
Ionic polarisation
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results from separation of +ve and –ve ions which are held together by ionic bonds
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results when free polar molecules are subjected to an electrical field, they orientate themselves along the field
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results when electrical field is applied to a large structure i.e.a cell, the free ions etc
Pregunta 4
Pregunta
When free polar molecules are subjected to an electrical field, they orientate themselves along the field this is known as
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Ionic polarisation
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Dipolar polarisation
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Hyperpolarisation
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Electric polarisation
Pregunta 5
Pregunta
Macro structural polarisation
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electrical field is applied to a large structure i.e.a cell, the free ions etc
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on surfaces with double electrical layer when an external electrical field causes absorptionand diffusion on opposite sides of the ions in the external medium
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when a dielectric is placed in an electric field, there is a displacement of the electron cloud relative to the nucleus(the inner circle).
Pregunta 6
Pregunta
Relaxation time is (10^-16)-(10^-14) for
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Electric polarisation
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Dipolar Polarisation
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Superficial polarisation
Pregunta 7
Pregunta
Relaxation time is (10^-3)-(1 sec) for
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Superficial potential
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Electric Potential
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Ionic Potential
Pregunta 8
Pregunta
The measure of the opposition that a circuit presents to a current when a voltage is applied
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Electric Impedence
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Electric Resistance
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Ohms Resistances
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