Multiple choice technology

Blue tooth changes the frequency

  1. 79 times per minute

  2. 1600 times per minute

  3. 79 times per second

  4. 1600 times per second
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bluetooth uses frequency-hopping spread spectrum (FHSS) to minimize interference. It hops 1600 times per second across 79 channels in the 2.4 GHz ISM band. This rapid hopping makes the connection robust against interference. Option C (79 per second) confuses the number of channels with hop rate, while A and B use minutes instead of seconds.

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