Friday

September 19, 2014

September 19, 2014

Posted by **J** on Tuesday, March 18, 2008 at 6:55pm.

Ok I got part (a) as being 75.82 V...but I am totally confused on part b I don't know what it is asking for or any equation that would work for it! Help please!

- Physics -
**Damon**, Tuesday, March 18, 2008 at 7:50pmI suppose maybe they mean what is the resistance you will see on the primary side.

Now the power on the secondary side is

P = V^2/R = (75.8)^2 / 125

P = 46 watts

Now I suppose we assume a perfect transformer so we put in that 46 watts on the primary side

46 = 25^2/R

R = 625/46 = 13.6 ohms

**Answer this Question**

**Related Questions**

Physics - A transformer consists of 275 primary windings and 834 secondary ...

physics. help! - An appliance transformer-converter is plugged into a 120 volt ...

physics - An appliance transformer-converter is plugged into a 120 volt AC house...

Physics - A model electric train requires 6 V to operate. If the primary coil of...

Physics - This question really has me stumped and I don't know why, I seem to ...

transformers - A resistive load of 2 k is connected across the ...

Physics problem - A transformer has 50 turns in its primary coil and 250 turns ...

physics prob. - An ideal transformer has 50 turns in its primary coil and 250 ...

physics - please tell me if this is correct, A step-down transformer has 16000 ...

physics - The function of those little black transformers that clog your power ...