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Besides breaking ground loops, isolation blocks high voltage surges and rejects high common mode voltages.

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Besides breaking ground loops, isolation blocks high voltage surges and rejects high common mode voltages.

(a) True

(b) False

This question was addressed to me in an interview for job.

Asked question is from General Considerations for Signal Conditioners topic in division Recording System of Biomedical Instrumentation

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Right option is (a) True

Easy explanation: It is true. Besides breaking ground loops, isolation blocks high voltage surges and rejects high common mode voltages. The isolation devices pass the signal from its source to the measurement device without a physical or galvanic connection by using transformer, optical or capacitive coupling technique.

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