Question { 7346 }

What is eddy current & eddy current loss ?

Answer

Whenever current flows in a conductor it produces magnetic
field around the conductor and the opposite is also true ie
if a magnetic field is provided around a conductor current
starts flowing thro that conductor. So in
transformers/armatures when flux is induced in
secondaries/rotor a current starts flowing in them because
of the flux or magnetic field, this current is called eddy
current and the loss incurred due to this unwanted current
is called eddy current loss.

Lamination are done to reduce eddy current loss

Hope the Q is answered vividly.

Question { 8123 }

A resistance, inductance & capacitance are connected in
series between points A & B.The voltage drops across the
resistance,inductance&capacitance are found to be
40V,70V&100V respectively. What is the total voltage between
between points A&B (Vab)?
a)210V b)70V c)50V d)230V

Answer

The answer is 50 volts but how??