First slide

Electrical machines and devices

Question

The number of turns in the primary coil of a transformer is 200 and the number of turns in the secondary coil is 10. If 240 volt AC is applied to the primary, the output from the secondary will be

Moderate

A

48 V
B

24 V
C

12 V
D

6 V

Solution

$\frac{V_{s}}{V_{p}} = \frac{N_{s}}{N_{p}} \Rightarrow V_{s} = \frac{N_{s}}{N_{p}} \times V_{p} = \frac{10}{200} \times 240 = 12 volts$

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