Friday

August 29, 2014

August 29, 2014

Posted by **TJ** on Monday, August 3, 2009 at 11:00pm.

I keep getting 200 using the equation Vs/Vp= Ns/Np

the answer is 500... what am i doing wrong

- Physics -
**DrBob222**, Tuesday, August 4, 2009 at 12:01amI don't know about the equation but if the secondary is 12 and primary is 60, then the primary must have more turns. If the secondary is 100 turns, then we multiply 100 x factor and the factor must give us a number higher than 100, so that is 60/12.

100 x (60/12) = 500 turns.

Using the formula,

Vs=12

Vp=60

Ns=100

Np = ?

(12/60) = (100/x)

and that gives me

12x = 60*100=60,000

x = 60,000/12 = 500

You must not be solving the proportion correctly.

- Physics -
**TJ**, Tuesday, August 4, 2009 at 12:08amThanks that helps alot i dont know why i was using 24 for Vp

**Related Questions**

Physics - Help!!! - I am having trouble understanding transformers!! Here is the...

Physics - In a step-up transformer, which of the following statements is correct...

Physics - The primary of a step-down transformer connected to a 240 V source has...

Physics - Which of the following is correct for a step-down transformer? Number ...

Sciece - The primary of a step-down transformer connected to a 240 V source has ...

Physics - Suppose there are two transformers between your house and the high-...

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 ...

physical science - The primary voltage is still 120 V and the number of primary ...

Physics - Transformer in AC - A soldering iron uses an electric current in a ...