New posts in Ac

Why do power grids tend to operate at low frequencies like 60 Hz and 50 Hz?

Multiplexing AC voltages

Maintaining clearances in HV MOSFET footprints

Source of initial magnetic field in an alternator

Does Ohm's law apply in an RLC circuit?

Use of different diodes in a bridge rectifier

Is it safe to touch 200 volts DC?

Why can an AC circuit breaker not be used in DC circuits?

Why harmonic distortion and not at other frequencies?

In below picture, is ammeter AC or DC? Is there direction for connection with load in series? If so what if I connect in wrong direction?