What do you mean frequency?
Whenever we use our electrical appliances, the power that comes is alternating current (AC). As we know AC is alternating between positive and negative. This oscillation of the charge in positive and negative to make a cycle is known as frequency. Frequency is the reciprocal of time taken to complete one cycle.
Frequency is
denoted by f and its unit is hertz (Hz).
Frequency= 1/time
The standard
frequency is 50-60 Hz. Maximum electrical equipment we use works in frequency
of 50 Hz because in 50 Hz frequency appliances works efficiently and effectively.

thanks for your kind information sir
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