![]() The movable coil is pivot-mounted between the fixed coils.The two pairs of coils (fixed pair and movable pair) are also connected in series with each other.The two movable coils are also positioned coaxially and are connected in series.As shown in figure, the fixed coils are connected in series and positioned coaxially (in line) with a space between them.Two movable coils are also used in the electrodynamometer meter.The electrodynamometer-type meter differs from the galvanometer types in that two fixed coils are used to produce the magnetic field instead of a permanent magnet.The electrodynamometer is often considered the basic indicating meter for low-frequency sinusoidal measurements. ![]() and a.c., which the electrodynamometer have.
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