We require a transformer to deliver 500 mA at 24 V from 120

We require a transformer to deliver 500 mA at 24 V from 120 V rms line source. How many turns are required in the secondary if the the primary turns is 3000? What is the primary current? Compute the number of primary turns required if N_2=600 but the transformer is required to deliver 1 A. What is the primary current now?

Solution

a) v1=120 volts

v2=24 volts

N1=3000

N2=?

I2= 500 mA

I1=?

WE KNOW TRANSFORMATION RATIO

K=(V2/V1)=(N2/N1)=(I1/I2).

K=24/120=0.2

0.2=(I1/I2)

I1=0.2*500*10^-3=0.1 AMPS

K=(N2/N1)

N1=N2/K

N1= 3000/0.2=15,000

b) some information is missing here.