A transformer of efficiency 90 % has turns ratio 10:1. If the voltage across the primary is 220 V and current in the primary is 0.5 A, then the current in secondary is

Question

A transformer of efficiency 90 % has turns ratio 10:1. If the voltage across the primary is 220 V and current in the primary is 0.5 A, then the current in secondary is (A) 5.5 A (B) 5 A (C) 4 A (D) 4.5 A

Tardigrade Admin · Accepted Answer

Given, (NP/NS)=(10/1) VP=220 V, IP=0.5 A We know that, (VP/VS)=(NP/NS) Efficiency, η=(O u t p u t p o w e r/I n p u t p o w e r)=(IS VS/IP VP) (90/100)=(IS/0.5) × (1/10) ⇒ IS=4.5 A

Q. A transformer of efficiency $90%$ has turns ratio $10 : 1.$ If the voltage across the primary is $220 V$ and current in the primary is $0.5 A,$ then the current in secondary is

$5.5 A$

$5 A$

$4 A$

$4.5 A$

Q. A transformer of efficiency 90% has turns ratio 10:1. If the voltage across the primary is 220V and current in the primary is 0.5A, then the current in secondary is

5.5A

5A

4A

4.5A

Given, NS​NP​​=110​ VP​=220V,IP​=0.5A We know that, VS​VP​​=NS​NP​​ Efficiency, η=InputpowerOutputpower​=IP​VP​IS​VS​​ 10090​=0.5IS​​ ×101​ ⇒IS​=4.5A

Q. A transformer of efficiency $90%$ has turns ratio $10 : 1.$ If the voltage across the primary is $220 V$ and current in the primary is $0.5 A,$ then the current in secondary is

$5.5 A$

$5 A$

$4 A$

$4.5 A$