Explain the ionic polarization mechanism as it pertains to a relaxor ferroelectric.

a. The polyhedron experiences a cooperative Jahn-Teller tilting to accommodate phonon dispersion

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b. The central ion displaces within the polyhedron in response to an AC excitation

C. Cross linking of polymer chains occurs by way of AC excitation thus enhancing polarization

Wrinkled graphene is now considered for use as electrodes in a supercapacitor. Why?

a. It affectively increases the inter-electrode distance thus reducing the likelihood of dielectric breakdown

b. It introduces a very large surface area as an electrode material

C. It introduces a highly polarizable dielectric between the electrodes

d. a and b

e. b and c

f. a and c


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