Question

How many turns are in its secondary coil, if its input voltage is 120 V and the primary coil has 210 turns

Answer 1

Complete Question

How many turns are in its secondary coil, if its input voltage is 120 V and the primary coil has 210 turns.

The output from the secondary coil is 12 V

Answer:

The value is
`N_s  =  21 \  turns`

Step-by-step explanation:

From the equation we are told that

The input voltage is
`V_(in)  = 120 \ V`

The number of turns of the primary coil is
`N_p =  210 \  turn`

The output from the secondary is
`V_o =  12V`

From the transformer equation

`(N_p)/(V_(in))  =(N_s)/(V_o)`

Here
`N_s` is the number of turns in the secondary coil

=>
`N_s  =  (N_p)/(V_(in))  *  V_s`

=>
`N_s  =  (210)/(120)  *  12`

=>
`N_s  =  21 \  turns`