Answer:
The output power will be 360 W. Thus option 3 is correct.
Explanation:
In a transformer there are two coils. One is primary and other is secondary coil. primary coil is some times known as input coil as input voltage will be applied to it and secondary coil is also known as output coil as output voltage is measured across it.
Here from given data
number of turns in primary coil n (in) = 50
number of turns in secondary will be n (out) = 200
The voltage in primarily v (in) = 120 V
input current is i (in) = 3A
but for ideal transformer input power is equal to output power.
P (in) = P (out)
P (0ut) = P (in) = V(in) × i (in) = 120 ×3 = 360 W
Thus ouput power will be 360 W
Hence option 3 is correct.