Electrical Machines, particularly Transformers, are crucial topics in the study of electrical engineering and physics. Understanding transformers is essential for students preparing for school exams and competitive assessments. Practicing MCQs and objective questions on this topic not only enhances conceptual clarity but also boosts confidence in tackling important questions in exams.
What You Will Practise Here
Fundamentals of transformers: definitions and types
Key concepts: turns ratio, voltage transformation, and current transformation
Important formulas related to transformer efficiency and losses
Diagrams illustrating transformer construction and operation
Applications of transformers in real-world scenarios
Common problems and solutions involving transformers
Objective questions focusing on theoretical and practical aspects
Exam Relevance
The topic of transformers is frequently featured in various examinations, including CBSE, State Boards, NEET, and JEE. Students can expect questions that test their understanding of transformer principles, calculations involving efficiency, and applications in electrical circuits. Common question patterns include numerical problems, conceptual explanations, and diagram-based queries, making it essential to grasp this topic thoroughly.
Common Mistakes Students Make
Confusing the relationship between primary and secondary voltage and current
Misunderstanding the concept of transformer efficiency and losses
Neglecting to analyze the turns ratio when solving problems
Overlooking the significance of core materials in transformer performance
FAQs
Question: What is the primary function of a transformer? Answer: The primary function of a transformer is to change the voltage level in an electrical circuit while maintaining the power level.
Question: How do I calculate the efficiency of a transformer? Answer: The efficiency of a transformer can be calculated using the formula: Efficiency = (Output Power / Input Power) × 100.
Start your journey towards mastering Electrical Machines - Transformers by solving practice MCQs today! Testing your understanding through objective questions will prepare you effectively for your exams and help you score better.
Q. In a step-up transformer, the number of turns in the primary winding is:
A.
Greater than the secondary winding
B.
Less than the secondary winding
C.
Equal to the secondary winding
D.
None of the above
Solution
In a step-up transformer, the primary winding has fewer turns than the secondary winding.
Correct Answer:
B
— Less than the secondary winding
