Answer:
Frequency
Step-by-step explanation:
The current's frequency which is measured in hertz (Hz) refers to the number of times the repetition of one cycle of the waveform occurs per second.
The frequency of mains electricity can repeats 50 times per second, that is its frequency is 50Hz.
The function of the frequency is to alternate the current between high and low current; and the lower the frequency alternating current, the more dangerous.
Therefore, an electric shock can be very fatal when the there is a low frequency alternating current.