Question

In a transformer 220 ac voltage is increased to 2200 volts. If the number of turns in the secondary are 2000, then the number of turns in the primary will be

• A. 200
• B. 100
• C. 50
• D. 20

Answer 1

Answer: (A)

200

Answer 2

$\frac{V_{p}}{V_{s}} = \frac{N_{p}}{N_{s}} \Rightarrow N_{p} = \left( \frac{220}{2200} \right)\mspace{6mu} 2000 = 200$