Question

A transformer consists of 250 primary windings and 725 secondary windings. If the emf of the primary coil is 20.0 V, what is the emf across the secondary coil?

A- 29.0 V
B- 18.1 V
C- 58.0 V
D- 34.5 V

Answer 1

i think its gonna be 58.0

Answer 2

i think you multiply the emf not sure

Answer 3

theres a formula for this right?

Answer 4

yeah !
\[\large \bf \frac{secondary~windings}{primary~widnings}=\frac{EMF~secondary}{EMF~primary}\]

Answer 5

just plug all the values and get your answer

Answer 6

okay thanks!

Answer 7

let me see what i get

Answer 8

sure!

Answer 9

725/250 right?

Answer 10

yep! this is your left hand side fraction

Answer 11

okay so its 2.9

Answer 12

So is it A?

Answer 13

right !

Answer 14

YES! THANK YOUUU!!!! <3

Answer 15

\[\large \bf \frac{725}{250}=\frac{x}{20}\]

Answer 16

find x ?

Answer 17

SO DIVIDE 250 and 20?

Answer 18

\[\large \bf 2.9=\frac{x}{20}\]

Answer 19

multiply both sides by 20,we get
\[\large \bf 2.9 \times 20=x\]

Answer 20

now solve for x

Answer 21

so its 58
That means my original answer was always right
thanks!

Answer 22

np !