In a step-up transformer ratio of number of turns in primary to seconday coil is 1: 25 . If input voltage is 230 volt and load current is 2 amp, then current in primary is :

Question

In a step-up transformer ratio of number of turns in primary to seconday coil is 1: 25 . If input voltage is 230 volt and load current is 2 amp, then current in primary is : (A) 50 A (B) 25 A (C) 12.5 A (D) 6.25 A

Tardigrade Admin · Accepted Answer

For step up transformer (Ip/Is)=(Ns/Np) (Ip/2)=(25/1) ⇒ Ip=50 amp

Q. In a step-up transformer ratio of number of turns in primary to seconday coil is $1 : 25.$ If input voltage is $230$ volt and load current is $2 am p$ , then current in primary is :

50 A

25 A

12.5 A

6.25 A

For step up transformer
$\frac{I _{p}}{I _{s}} = \frac{N _{s}}{N _{p}}$
$\frac{I _{p}}{2} = \frac{25}{1}$
$\Rightarrow I_{p} = 50 am p$

Q. In a step-up transformer ratio of number of turns in primary to seconday coil is 1:25. If input voltage is 230 volt and load current is 2amp, then current in primary is :