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The value of dBm in power measurement is predictable by assuming the reference, which is equal to ________

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The value of dBm in power measurement is predictable by assuming the reference, which is equal to ________

(a) 1mW

(b) 10mW

(c) 1/10 mW

(d) 1/100 mW

The question was asked by my college director while I was bunking the class.

This intriguing question comes from Frequency Compensation in section Frequency Response of Electronic Devices & Circuits

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Correct option is (a) 1mW

Best explanation: Basically, the Decibel (dB) is a logarithmic unit which is used to state the gain of audio frequency amplifiers. This is so for the reason that the response of a human ear to the sound intensity exhibits logarithmic nature.

Apart from this, dBm is a unit which is often used in power measurement.  dBm refers to the dB value which is estimated by assumption of a reference whose value is equal to 1mW.

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