Home
Class 12
PHYSICS
A step down transformer converts transmi...

A step down transformer converts transmission line voltage from 2200 V to 220 V. Primary coil is having 5000 turns. Efficiency of transformer is 90% and output power is 8 kW. Evaluate number of turns in secondary coil and input power.

Text Solution

Verified by Experts

`n_(P)=5000`
`E_(P)=2200V `
`E_(S)= 220V eta=90%`
`P_(O)= 8kW = 8000 W `
`eta= Efficiency = ("Output Power ") /("Input power ") = (E_(S)I_(S))/(E_(P)I_(P))`
`(90)/(100) = (220I_(s))/(2200I_(P)) `
`(I_(S))/(I_(P))= (n_(P))/(n_(S))= (5000)/(n_(S))`
`(90)/(100)= (220xx5000)/(2200n_(S))`
`eta_(s)= (220xx5000xx100)/(2200xx90)= 556` turns
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise COMPETITION FILE EXEMPLAR PROBLEMS (OBJECTIVE QUESTIONS ) (Multiple choice question (Type ) )|13 Videos

  • ATOMS

    MODERN PUBLICATION|Exercise Chapter Practice Test|16 Videos

Similar Questions

Explore conceptually related problems

A step down transformer converts transmission line voltage from 11000 V to 220 V. The primary of the transformer has 6000 turns and efficiency of the transformer is 60%. If the output power is 9 kW, then the input power will be

A step down transformer converts a voltage of 2000 V inot 200 V in the transmission line. Number of turns in primary coil is 5000, efficiency of transformer is 80% and output power is 8 kW. Calculate input power and number of turns in secondary coil.

A step-down transfomer reduces the voltage of a transmission line from 2200 V to 220 V. the power delivered by it is 880 W and its efficiency is 88%. The input current is

The number of turns in secondary coil of a transformer is 100 times the number of turns in primary coil. What is the transformer ratio ?

A transformer has 100 turns in the primary coil and carries 8A current. If input power is one kilowatt, the number of turns required in the secondary coil to have 500V output will be

A power transmission line feeds input power at 2400 V to a step down transformer with its primary windings having 4000 turns. What should be the number of turns in the secondary windings in order to get output power at 240 V?

A power transmission line feeds input power at 2300 V to a step down trnasformer with it primary windings having 4000 turns. What should be the number of turns in the seconday windings in order to get output power at 230 V?

A power transmission line feeds input power at 2400V to a step-down transformer and which delivers power at 240V with its primary windings having 5000 turns . If the current in the primary coil of the transformer is 5A and its efficiency is 80%, then what is the output current (in A)?