Biophysics MCQs Part 3 PMU

Beschreibung

Just made up questions. Based on essays
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Zusammenfassung der Ressource

Frage 1

Frage
Materials which have no free charges are called
Antworten
  • Dielectrics
  • Transistors
  • Polarisers

Frage 2

Frage
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
Antworten
  • Electric polarisation
  • Ionic polarisation
  • Dipolar polarisation
  • Macrostructural polarisation

Frage 3

Frage
Ionic polarisation
Antworten
  • results from separation of +ve and –ve ions which are held together by ionic bonds
  • results when free polar molecules are subjected to an electrical field, they orientate themselves along the field
  • results when electrical field is applied to a large structure i.e.a cell, the free ions etc

Frage 4

Frage
When free polar molecules are subjected to an electrical field, they orientate themselves along the field this is known as
Antworten
  • Ionic polarisation
  • Dipolar polarisation
  • Hyperpolarisation
  • Electric polarisation

Frage 5

Frage
Macro structural polarisation
Antworten
  • electrical field is applied to a large structure i.e.a cell, the free ions etc
  • on surfaces with double electrical layer when an external electrical field causes absorptionand diffusion on opposite sides of the ions in the external medium
  • when a dielectric is placed in an electric field, there is a displacement of the electron cloud relative to the nucleus(the inner circle).

Frage 6

Frage
Relaxation time is (10^-16)-(10^-14) for
Antworten
  • Electric polarisation
  • Dipolar Polarisation
  • Superficial polarisation

Frage 7

Frage
Relaxation time is (10^-3)-(1 sec) for
Antworten
  • Superficial potential
  • Electric Potential
  • Ionic Potential

Frage 8

Frage
The measure of the opposition that a circuit presents to a current when a voltage is applied
Antworten
  • Electric Impedence
  • Electric Resistance
  • Ohms Resistances
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