A transformer consisting of 300 turns in the primary and 150 turns in the secondary gives output power of…

A transformer consisting of 300 turns in the primary and 150 turns in the secondary gives output power of  2.2 kW . If the current in the secondary coil is  10 A , then the input voltage and current in the primary coil are:
  1. 440 V and 20 A
  2. 220 V and 20 A
  3. 440 V and 5 A
  4. 220 V and 10 A

Solution

Assuming 100% efficiency,

V2V1=i1i2=N2N1

i1i2=N2N1i110=150300i1=5 A

P=VI2200=5×V1V1=440 V

Asked in: JEE Main 2019 (10 Apr Shift 1)

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