Answer / ashvin rathod

Amplitude modulation (AM) is a technique used in electronic communication, most commonly for transmitting information via a radio carrier wave. AM works by varying the strength of the transmitted signal in relation to the information being sent.
Rectifiers are used for detection of amplitude modulated radio signals. The signal may be amplified before detection. If not, a very low voltage drop diode or a diode biased with a fixed voltage must be used.
Demodulation is the act of extracting the original information-bearing signal from a modulated carrier wave. A demodulator is an electronic circuit (or computer program in a software-defined radio) that is used to recover the information content from the modulated carrier wave.
When using a rectifier for demodulation the capacitor and load resistance must be carefully matched: too low a capacitance will result in the high frequency carrier passing to the output, and too high will result in the capacitor just charging and staying charged.
hence there is a chances of battery charged and then automatically charged when rectifier ON condition.

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