The primary of a transformer has 100 turns and its second...
The primary of a transformer has 100 turns and its secondary has 200 turns. If the voltage at the primary is 100V, determine the voltage at the secondary.
50V
100V
200V
400V
Correct answer is C
The ideal transformer (either step-up or step-down) works with the equation:
VsVp=NsNp=IpIs
where Vs and Vp are the voltages applied to the secondary and the primary respectively
Ns and Np are the number of turns on the secondary and primary coils respectively
Ip and Is are the currents flowing in the primary and secondary coils respectively.
Vs100=200100
Vs=200×100100=200V
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