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:
\(\frac{V_{s}}{V_{p}} = \frac{N_{s}}{N_{p}} = \frac{I_{p}}{I_{s}}\)
where \(V_{s}\) and \(V_{p}\) are the voltages applied to the secondary and the primary respectively
\(N_{s}\) and \(N_{p}\) are the number of turns on the secondary and primary coils respectively
\(I_{p}\) and \(I_{s}\) are the currents flowing in the primary and secondary coils respectively.
\(\frac{V_{s}}{100} = \frac{200}{100}\)
\(V_{s} = \frac{200\times 100}{100} = 200V\)
Which of the following statements about magnetic lines of force is not correct? They ...
A boy in a barber's shop sits between two parallel mirrors. The number of images observed by him...
Which of the following statements about the electromagnetic waves is correct? ...
Which of the following statements about pressure in a liquid is correct? ...
In storing magnets, keepers are used to ...
All the heat generated by a current of 2A passing through a resistor of 6Ω for 2.5s is used to...