**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z

As we know that in transformers we have

here we know that

now from above equation we will have

now we have to reduce this voltage to final voltage of V = 4 V

so again we will have

so we need to take such a winding whose ratio is 1:5

So it is satisfied in X

so answer will be

B)-   X

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

a sonic boom is a loud boom that breaks the sound barrier

explanation: