The voltage entering a transformer’s primary winding is 120 volts. the primary winding is wrapped around the iron core 10 times. the secondary coil is wrapped around the core 4 times. what is the voltage leaving the transformer?

Answer

 48 Volts  

Explanation
The question can be solve using the turn rule of a transformer that states;

Np/Ns = Vp/Vs
Where Np ⇒ number of turns in the primary coil.
            Ns ⇒number of turns in the seconndary coil
            Vp ⇒ primary voltage
             Vs ⇒secondary voltage

Np/Ns = Vp/Vs

10/4 = 120/Vp

Vp = (120 × 4)/10

      = 480/10
      = 48 Volts  

 

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