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Yttrium-iron-garnet is used as microwave isolators in the ____ range.

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Yttrium-iron-garnet is used as microwave isolators in the ____ range.

(a) KHz

(b) MHz

(c) GHz

(d) THz

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The correct choice is (c) GHz

Easy explanation: Garnets such as Y3Fe5O12 (yttrium-iron-garnet)have a narrow resonance line width. These are popularly used as microwave isolators in the GHz range.

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