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Which of the given wireless technologies used in IoT, consumes the least amount of power?

  1. Zigbee
  2. Bluetooth
  3. Wi-Fi
  4. GSM/CDMA
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Internet of things(IoT) uses short range communication technology – Bluetooth. It’s an ultra low energy wireless technology for IOT devices which consumes the smallest amount of power in comparison to the already existing Bluetooth networking standards

Option B is correct.
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2. Bluetooth

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Bluetooth Low Energy uses less power than standard Bluetooth and is used in hardware such as fitness trackers, smart watches and other connected devices in order to wirelessly transmit data without heavily compromising the battery power in a user’s phone.
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