Electricity question?

Posted on 2017-03-14 18:55:00 in Engineering by GUNNER

A 3-phase transformer has how many windings? 
a.1 
b.2 
c.3 
d.6 
Increrasing the frequency causes the power to increase in which of the following series curicuts? 
a.RC 
b.RL 
c.both of these 
d. neither of these 

At resonance, degree is approximately 
a. 0 
b. 45 
C. 90 
D. 180 

The turning circuit in an A.M raido filters out all but a narrow frequency range. This is an example of a 
a. low-pass filter 
b. hihg-pass filter 
c. band-pass filter 
d. band-reject filter 

A laminated core is used to reduce 
a. hysteresis 
b. eddy currents 
d. copper loss 


I'll be reeaally glad if you guys answer. help me out.

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