NEET Exam  >  NEET Questions  >  A transformer having efficiency of 90% is wor... Start Learning for Free
A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the
current in the secondary coil is 6A, the voltage across the secondary coil and the current in
the primary coil respectively are :
  • a)
    450 V, 13.5 A
  • b)
    600 V, 15 A
  • c)
    300 V, 15 A
  • d)
    450 V, 15 A
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
A transformer having efficiency of 90% is working on 200 V and 3 kW po...
Free Test
Community Answer
A transformer having efficiency of 90% is working on 200 V and 3 kW po...
Given:
Efficiency of the transformer = 90%
Input voltage (V1) = 200V
Input power (P1) = 3kW = 3000W
Current in the secondary coil (I2) = 6A

To find:
Voltage across the secondary coil (V2)
Current in the primary coil (I1)

Solution:
Efficiency of a transformer is given by the formula:
Efficiency = (Output power / Input power) * 100

We know that efficiency is given as 90%, so we can write:
90 = (Output power / 3000) * 100

Step 1: Calculating Output Power
Rearranging the equation, we have:
Output power = (90 / 100) * 3000

Output power = 0.9 * 3000
Output power = 2700W

Step 2: Calculating Voltage across Secondary Coil (V2)
We know that power is given by the formula:
Power = Voltage * Current

For the secondary coil, we can write:
2700 = V2 * 6

Dividing both sides by 6, we get:
V2 = 2700 / 6
V2 = 450V

Step 3: Calculating Current in Primary Coil (I1)
We know that the power is the same in the primary and secondary coils, so we can write:
P1 = P2
3000 = V1 * I1

Substituting the given values, we get:
3000 = 200 * I1

Dividing both sides by 200, we get:
I1 = 3000 / 200
I1 = 15A

Therefore, the voltage across the secondary coil (V2) is 450V and the current in the primary coil (I1) is 15A.
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
Explore Courses for NEET exam

Top Courses for NEET

A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If thecurrent in the secondary coil is 6A, the voltage across the secondary coil and the current inthe primary coil respectively are :a)450 V, 13.5 Ab)600 V, 15 Ac)300 V, 15 Ad)450 V, 15 ACorrect answer is option 'D'. Can you explain this answer?
Question Description
A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If thecurrent in the secondary coil is 6A, the voltage across the secondary coil and the current inthe primary coil respectively are :a)450 V, 13.5 Ab)600 V, 15 Ac)300 V, 15 Ad)450 V, 15 ACorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If thecurrent in the secondary coil is 6A, the voltage across the secondary coil and the current inthe primary coil respectively are :a)450 V, 13.5 Ab)600 V, 15 Ac)300 V, 15 Ad)450 V, 15 ACorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If thecurrent in the secondary coil is 6A, the voltage across the secondary coil and the current inthe primary coil respectively are :a)450 V, 13.5 Ab)600 V, 15 Ac)300 V, 15 Ad)450 V, 15 ACorrect answer is option 'D'. Can you explain this answer?.
Solutions for A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If thecurrent in the secondary coil is 6A, the voltage across the secondary coil and the current inthe primary coil respectively are :a)450 V, 13.5 Ab)600 V, 15 Ac)300 V, 15 Ad)450 V, 15 ACorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If thecurrent in the secondary coil is 6A, the voltage across the secondary coil and the current inthe primary coil respectively are :a)450 V, 13.5 Ab)600 V, 15 Ac)300 V, 15 Ad)450 V, 15 ACorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If thecurrent in the secondary coil is 6A, the voltage across the secondary coil and the current inthe primary coil respectively are :a)450 V, 13.5 Ab)600 V, 15 Ac)300 V, 15 Ad)450 V, 15 ACorrect answer is option 'D'. Can you explain this answer?, a detailed solution for A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If thecurrent in the secondary coil is 6A, the voltage across the secondary coil and the current inthe primary coil respectively are :a)450 V, 13.5 Ab)600 V, 15 Ac)300 V, 15 Ad)450 V, 15 ACorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If thecurrent in the secondary coil is 6A, the voltage across the secondary coil and the current inthe primary coil respectively are :a)450 V, 13.5 Ab)600 V, 15 Ac)300 V, 15 Ad)450 V, 15 ACorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If thecurrent in the secondary coil is 6A, the voltage across the secondary coil and the current inthe primary coil respectively are :a)450 V, 13.5 Ab)600 V, 15 Ac)300 V, 15 Ad)450 V, 15 ACorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice NEET tests.
Explore Courses for NEET exam

Top Courses for NEET

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev