Question

A step down transformer is connected to main supply 200 V to operate a 6 V, 30 W bulb. The current in primary is ?

Answer 1

Assuming the transformer has no losses, the primary : secondary turns ratio is equal to the primary: secondary voltage ratio = 200:6.
The current in the secondary is 30/6 = 5 A.
The primary current is found by dividing the secondary current by the turns ratio:
\[I _{p}=\frac{5\times6}{200}=you\ can\ calculate\]

Answer 2

Ya i got it .. thanx :-)

Answer 3

You're welcome :)

Answer 4

:-) :-)