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  $N_s = 21 \ turns$

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

   $\frac{N_p}{V_{in}} =\frac{N_s}{V_o}$

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

=> $N_s = \frac{N_p}{V_{in}} * V_s$

=>$N_s = \frac{210}{120} * 12$

=>$N_s = 21 \ turns$