Multiple choice general knowledge science & technology

Cell phones use lower-power radio signals because:

  1. The signals don't travel very far.

  2. Sending a signal doesn't drain the battery.

  3. Both 1 and 2.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cell phones use low-power signals because cell towers are positioned close together (signals don't need to travel far), and this design conserves battery life since transmitting weaker signals consumes less power. High-power transmission would quickly drain the battery and cause interference between nearby cells.

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