Question

The minimum frequency at which a signal comprising of 30 Hz, 50 Hz and 70 Hz frequencies
should be sampled to avoid aliasing is _____________ Hz.

Answer 1

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Answer 2

Answer:

The minimum frequency at which a signal comprising of 30 Hz, 50 Hz and 70 Hz frequencies should be sampled to avoid aliasing is 90 Hz.

Explanation:

There are given ,

The minimum frequency at which a signal comprising of 30 Hz, 50 Hz and 70 Hz frequencies so here we have to find frequencies should be sampled to avoid aliasing.

Frequency is the number of occurrences of a repeating event per unit of time. It is also occasionally referred to as temporal frequency for clarity, and is distinct from angular frequency. Frequency is measured in hertz which is equal to one event per second.

$f=\frac{1}{t}$

Where time (t) is inversely propositional,  

Here we use frequency sampling,

Hence The minimum frequency at which a signal comprising of 30 Hz, 50 Hz and 70 Hz frequencies should be sampled to avoid aliasing is 90 Hz.

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