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A 'landline' phone is fixed. it has to be physically plugged into a socket on the wall to connect to the phone network. A mobile phone is essentially a two-way portable radio which sends and receives calls via high-frequency radio waves.
No.In "Airplane" mode or when switched off there are no radio frequency emissions from a cell phone.
Mobile phones do not have AM radios because that's an old frequency, we now have FM radio so it would make mobile phones look dated. Just like in movies, when you see a mobile phone that's old, you also think the movie is dated.
RX nd TX refers to the radio frequencies the phone uses to receive and transmit voice calls. A mobile phone is essentially two 'walkie-talkies' operating at the same time - so you can talk and hear simultaneously. The handset transmits (TX) on one frequency, and receives (RX) on a different frequency.
the frequency used in mobile communication should be greater then 30mhz so cannot be reflected by the ionosphere thats why we are using a frequency of range less ghz so called "radio waves"
Only similarity between a microwave and mobile is that both uses a electromagnetic radiation but of different frequency for its operation. Microwaves uses micro waves to heat up food molecules where as mobile phone uses radio wave frequency.
Resonance describes a 'condition' rather than a 'purpose', but it is made use of in (for example) radio circuits, in order to tune the radio to a particular frequency (the resonant frequency of the signal).
Resonance describes a 'condition' rather than a 'purpose', but it is made use of in (for example) radio circuits, in order to tune the radio to a particular frequency (the resonant frequency of the signal).
Yes.Added: Absolutely - Your ordinary (consumer-type) cellphone is simply nothing more than a radio transmitter. Anyone tuned to the proper radio frequency can hear your conversation.
Yes, depending on the type.
they both communication device
a mobile radio would be better than than a phone in one case where you may be lost and have no phone signal you could switch to an emergency station but if you needed to find a way to contact somewhere a mobile radio would not be a good item in this situation,