Question { Areva, 18123 }

HOW TO FIND THE PRIMARY AND SECONDARY OF TRANSFORMER(IN OFF
CONDITION) USING MULTIMETER? IS IT POSSIBLE FIND BY SEEING
RESISTANCE???

Answer

as per working principle transformer , there is no primary &
secondary of transformer . transformer can be work in either
ways.

but if we have to check HV & LV we can do with multimeter .
as per transformer ratio

V1/V2=N1/N2=I2/I1. ................eqn 1
&
R =rho L/A . ...............eqn 2
\
as LV side requirement of current more & no of turns are
less , & cross sectional area of conductor is lare as per
eqn no.1& 2,resistance offered by conductor is less as
compare to HV .

Question { 34714 }

What is the difference between Split ring and slip ring?

Answer

split ring is use in dc motor to make the direction of
current uniformly . the rotor of generator rotate by 360
degree . as per principle generating wave be sinusoidal for
180 degree +ve & 180-360 degree -ve .so to make the
direction of waveform unidirectional the split ring rotate
after each interval of 180 degree .

the difference between slip ring & split ring is slip ring
are stationary . & split ring rotate after 180 degree