Electronics Engineering Question:

How to measure frequency without CRO?

We can also measure frequency by Frequency meter and frequency analyzer.
Please check it out.

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What is the Value of binary number with n digit, all of which are unity? a) 2 to the power n b) 2 to the power (n-1) c) (n square) - 1 d) (2 to the power n) - 1	What is Transponder? Give the difference between Transducer and Transponder?