1) The fact that you turned the volume up.2) A change in the signal emitted by the radio station.
3) The conditions for listening improved; for some reason, there is less interference.
Try turning the volume knob up! Or move it closer to your ear.
Increase the volume.
Sure. Radio waves, of the right wavelength(microwaves) and intensity will register as heat on the skin, and will eventually cause burns and hurt.
Watts
Intensity of sound is dealt as volume in case of radio sets. Intensity is directly proportional to the square of amplitude. So as volume is turned down, intensity is reduced and so the amplitude is decreased.
u might have blowed the transmitter
Radio does not cause lightning.
The increase in current (assuming resistance is the same and increase in voltage will lead to an increase in current) will fry your portable radio.
Intensity of sound is dealt as volume in case of radio sets. Intensity is directly proportional to the square of amplitude. So as volume is turned down, intensity is reduced and so the amplitude is decreased.
The question is too vague for an answer. It depends on the intensity of the radio wave source.
sound waves
Sunspot activity affects radio communications. It can cause ionisation of the D and E layers of the ionosphere which allows High frequency radio waves to be bent back toward Earth, providing multiple hop communications.