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What is the attenuation in dB assuming I1 is the input current and I2 is the output current leaving the port?

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in Network Theory by (157k points)
What is the attenuation in dB assuming I1 is the input current and I2 is the output current leaving the port?

(a) 10 log10 (I1/I2)

(b) 10 log10 (I2/I1)

(c) 20 log10 (I2/I1)

(d) 20 log10 (I1/I2)

The question was posed to me during an online interview.

Origin of the question is Attenuators in portion Filters and Attenuators of Network Theory

1 Answer

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Best answer
Right choice is (d) 20 log10 (I1/I2)

To explain I would say: Assuming I1 is the input current and I2 is the output current leaving the port, the attenuation in dB is Attenuation in dB = 20 log10 (I1/I2) where I1 is the input current and I2 is the output current leaving the port.

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