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 :

Question

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 : (A) 220 V and 10 A (B) 440 V and 5 A (C) 440 V and 20 A (D) 220 V and 20 A

Tardigrade Admin · Accepted Answer

Given NP = 300, Ns = 150, P0 = 2200 W Is = 10A P0 = V0 I0 ⇒ 2200 = V0 × 10 ⇒ V0 = 220 V ∵ (Vi/V0) = (NP/Ns) ⇒ Vi = 2 × 220 = 440 V Also P0 = Vi Ii ⇒ Ii = (2200/440) = 5A

Q. 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 :

$220 V$ and $10 A$

$440 V$ and $5 A$

$440 V$ and $20 A$

$220 V$ and $20 A$

Q. A transformer consisting of 300 turns in the primary and 150 turns in the secondary gives output power of 2.2kW. If the current in the secondary coil is 10A, then the input voltage and current in the primary coil are :

220V and 10A

440V and 5A

440V and 20A

220V and 20A

Given NP​=300,Ns​=150,P0​=2200W Is​=10A P0​=V0​I0​⇒2200=V0​×10⇒V0​=220V ∵V0​Vi​​=Ns​NP​​⇒Vi​=2×220=440V Also P0​=Vi​Ii​ ⇒Ii​=4402200​=5A

Q. 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 :

$220 V$ and $10 A$

$440 V$ and $5 A$

$440 V$ and $20 A$

$220 V$ and $20 A$