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Re: your mail



On Wed, 29 Apr 1998, Ken Fox wrote:

In an ideal transformer the input is 12V 24W when connected to a
load and it has 100 turns. The output is 240V. Determine:
a) the number of secondary turns -
b) value of current in the secondary coil -
c) power in the primary when the output is not connected to any
resistance -

My Answers for the transformer ? I'm troubled with (c) question.

Practically zero. The Xfmer acts as an almost pure inductor. You can
demo this by placing a bulb in series with the primary. No secondary o/p
=> no primary i/p.

Allen