Multiple Choice
A transformer cannot raise or lower the voltage of a D.C. supply because
A) there is no need to change the D.C. voltage
B) a D.C. circuit has more losses
C) Faraday's laws of electromagnetic induction are not valid since the rate of change of flux is zero
D) none of the above
Correct Answer:
Verified
Correct Answer:
Verified
Q12: The dielectric strength of transformer oil is
Q13: The efficiency of a transformer will be
Q14: The purpose of providing an iron core
Q15: Which of the following does not change
Q16: No-load current in a transformer<br>A)lags behind the
Q18: Efficiency of a power transformer is of
Q19: The degree of mechanical vibrations produced by
Q20: In a given transformer for given applied
Q21: In the transformer following winding has got
Q22: In a transformer the energy is conveyed