A transformer consisting of 300 turns in the primary and 150 turns in secondary 

gives output power of 2.2 kW. If the current in the secondary coil is 10A, then the 

input voltage and current in the primary coil are:

  • Option 1)

    220 V and 20 A 

  • Option 2)

    440 V and 20 A

  • Option 3)

    440 V and 5 A

  • Option 4)

     220 V and 10 A

 

Answers (1)

 

Ideal transformer -

There is no loss of power.

- wherein

P_{out}= P_{in}

V_{s}\, {i}'_{s}= V_{in}i_{in}

 

 

Ideal transformer -

\frac{\varepsilon _{s}}{\varepsilon _{P}}= \frac{N _{s}}{N _{P}}= \frac{V_{s}}{V _{P}}= \frac{{i}' _{P}}{{i}'_{s}}
 

- wherein

\varepsilon _{s}\rightarrow induced e.m.s.in secondary

\varepsilon _{P}\rightarrow induced e.m.s.in primary

 

 

P_{out}=V_oI_o

P_{out}=2.2kW

=> 2.2kW=V_o\times 10

=> V_o=\frac{2.2\times 10^{3}}{10}=220V

Now,

\frac{n_I}{n_{II}}=\frac{V_I}{V_{II}}=\frac{I_{II}}{I_I}

So, \frac{300}{150}=\frac{V_I}{220}

=> V_I=440V

Similarly,

\frac{300}{150}=\frac{I_{II}}{I_{I}}

I_{I}=\frac{I_{II}}{2}=\frac{10}{2}=5A


Option 1)

220 V and 20 A 

Option 2)

440 V and 20 A

Option 3)

440 V and 5 A

Option 4)

 220 V and 10 A

Most Viewed Questions

Preparation Products

Knockout JEE Main (Six Month Subscription)

- AI Coach Study Modules, - Unlimited Mock Tests, - Study Improvement Plan.

₹ 9999/- ₹ 8499/-
Buy Now
Knockout JEE Main (Nine Month Subscription)

- AI Coach Study Modules, - Unlimited Mock Tests, - Study Improvement Plan.

₹ 13999/- ₹ 12499/-
Buy Now
Test Series JEE Main 2024

Chapter/Subject/Full Mock Tests for JEE Main, Personalized Performance Report, Weakness Sheet, Complete Answer Key,.

₹ 7999/- ₹ 4999/-
Buy Now
Knockout JEE Main (One Month Subscription)

- AI Coach Study Modules, - Unlimited Mock Tests, - Study Improvement Plan.

₹ 7999/- ₹ 4999/-
Buy Now
Knockout JEE Main (Twelve Months Subscription)

- AI Coach Study Modules, - Unlimited Mock Tests, - Study Improvement Plan.

₹ 19999/- ₹ 14499/-
Buy Now
Boost your Preparation for JEE Main 2021 with Personlized Coaching
 
Exams
Articles
Questions