Question: 1 18, a) When two devices communicate using NFC, how close must they be? b) How does near field communication differ from normal radio communication?

1 18, a) When two devices communicate using NFC,

1 18, a) When two devices communicate using NFC, how close must they be? b) How does near field communication differ from normal radio communication? c) Passive RFID chips have no batteries. How can they transmit when queried? d) What is the state of NFC standards

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