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If the centre of gravity of the positive and negative charges in atody do not coincide in the absence of.an applied electric field, the substance has an electric dipole moment and is said be spontaneously polarised. Such a substance is called | |
A. | insulator [Wrong Answer] |
B. | dielectric [Wrong Answer] |
C. | conductor [Wrong Answer] |
D. | ferro-electric [Correct Answer] |