Quiz
Biophysics MCQs Part 3 PMU
Perguntas do quiz (8)
1Materials which have no free charges are called
- ADielectrics
- BTransistors
- CPolarisers
2When 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- AElectric polarisation
- BIonic polarisation
- CDipolar polarisation
- DMacrostructural polarisation
3Ionic polarisation
- Aresults from separation of +ve and –ve ions which are held together by ionic bonds
- Bresults when free polar molecules are subjected to an electrical field, they orientate themselves along the field
- Cresults when electrical field is applied to a large structure i.e.a cell, the free ions etc
4When free polar molecules are subjected to an electrical field, they orientate themselves along the field this is known as
- AIonic polarisation
- BDipolar polarisation
- CHyperpolarisation
- DElectric polarisation
5Macro structural polarisation
- Aelectrical field is applied to a large structure i.e.a cell, the free ions etc
- Bon surfaces with double electrical layer when an external electrical field causes absorptionand diffusion on opposite sides of the ions in the external medium
- Cwhen a dielectric is placed in an electric field, there is a displacement of the electron cloud relative to the nucleus(the inner circle).
6Relaxation time is (10^-16)-(10^-14) for
- AElectric polarisation
- BDipolar Polarisation
- CSuperficial polarisation
7Relaxation time is (10^-3)-(1 sec) for
- ASuperficial potential
- BElectric Potential
- CIonic Potential
8The measure of the opposition that a circuit presents to a current when a voltage is applied
- AElectric Impedence
- BElectric Resistance
- COhms Resistances
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- Just made up questions. Based on essays
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